./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y --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 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:03:33,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:03:33,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:03:33,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:03:33,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:03:33,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:03:33,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:03:33,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:03:33,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:03:33,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:03:33,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:03:33,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:03:33,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:03:33,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:03:33,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:03:33,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:03:33,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:03:33,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:03:33,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:03:33,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:03:33,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:03:33,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:03:33,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:03:33,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:03:33,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:03:33,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:03:33,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:03:33,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:03:33,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:03:33,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:03:33,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:03:33,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:03:33,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:03:33,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:03:33,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:03:33,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:03:33,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:03:33,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:03:33,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:03:33,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:03:33,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:03:33,284 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 18:03:33,314 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:03:33,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:03:33,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:03:33,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:03:33,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:03:33,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:03:33,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:03:33,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:03:33,318 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:03:33,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:03:33,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:03:33,318 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:03:33,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:03:33,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:03:33,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:03:33,319 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:03:33,320 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:03:33,320 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:03:33,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:03:33,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:03:33,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:03:33,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:03:33,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:03:33,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:03:33,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:03:33,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:33,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:03:33,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:03:33,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:03:33,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:03:33,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:03:33,323 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 [2021-11-13 18:03:33,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:03:33,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:03:33,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:03:33,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:03:33,659 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:03:33,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-13 18:03:33,757 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data/49c95ba8f/85e7076c3d91479d95f879fd302845f4/FLAG2808e52fc [2021-11-13 18:03:34,390 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:03:34,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-13 18:03:34,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data/49c95ba8f/85e7076c3d91479d95f879fd302845f4/FLAG2808e52fc [2021-11-13 18:03:34,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data/49c95ba8f/85e7076c3d91479d95f879fd302845f4 [2021-11-13 18:03:34,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:03:34,612 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:03:34,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:34,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:03:34,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:03:34,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:34" (1/1) ... [2021-11-13 18:03:34,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267edcca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:34, skipping insertion in model container [2021-11-13 18:03:34,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:34" (1/1) ... [2021-11-13 18:03:34,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:03:34,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:03:35,276 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-13 18:03:35,288 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-13 18:03:35,377 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-13 18:03:35,378 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-13 18:03:35,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:35,394 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) [2021-11-13 18:03:35,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75d9617f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:35, skipping insertion in model container [2021-11-13 18:03:35,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:35,395 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-13 18:03:35,397 INFO L158 Benchmark]: Toolchain (without parser) took 783.64ms. Allocated memory is still 102.8MB. Free memory was 64.8MB in the beginning and 64.0MB in the end (delta: 747.5kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:03:35,398 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory was 72.9MB in the beginning and 72.8MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:03:35,403 INFO L158 Benchmark]: CACSL2BoogieTranslator took 781.02ms. Allocated memory is still 102.8MB. Free memory was 64.6MB in the beginning and 64.0MB in the end (delta: 549.1kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:03:35,405 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory was 72.9MB in the beginning and 72.8MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 781.02ms. Allocated memory is still 102.8MB. Free memory was 64.6MB in the beginning and 64.0MB in the end (delta: 549.1kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y --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 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:03:37,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:03:37,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:03:37,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:03:37,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:03:37,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:03:37,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:03:37,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:03:37,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:03:37,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:03:37,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:03:37,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:03:37,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:03:37,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:03:37,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:03:37,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:03:37,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:03:37,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:03:37,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:03:37,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:03:37,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:03:37,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:03:37,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:03:37,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:03:37,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:03:37,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:03:37,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:03:37,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:03:37,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:03:37,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:03:37,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:03:37,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:03:37,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:03:37,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:03:37,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:03:37,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:03:37,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:03:37,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:03:37,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:03:37,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:03:37,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:03:37,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-13 18:03:37,786 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:03:37,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:03:37,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:03:37,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:03:37,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:03:37,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:03:37,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:03:37,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:03:37,790 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:03:37,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:03:37,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:03:37,792 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:03:37,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:03:37,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:03:37,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:03:37,793 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:03:37,793 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:03:37,793 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:03:37,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:03:37,794 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:03:37,794 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:03:37,794 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:03:37,795 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:03:37,795 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:03:37,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:03:37,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:03:37,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:03:37,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:37,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:03:37,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:03:37,796 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:03:37,797 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:03:37,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:03:37,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:03:37,798 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 [2021-11-13 18:03:38,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:03:38,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:03:38,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:03:38,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:03:38,214 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:03:38,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-13 18:03:38,302 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data/9aba6667c/2c3a53244c1a49bc8e3294203fc49cbb/FLAGc46ac9340 [2021-11-13 18:03:39,021 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:03:39,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-13 18:03:39,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data/9aba6667c/2c3a53244c1a49bc8e3294203fc49cbb/FLAGc46ac9340 [2021-11-13 18:03:39,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/data/9aba6667c/2c3a53244c1a49bc8e3294203fc49cbb [2021-11-13 18:03:39,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:03:39,240 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:03:39,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:39,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:03:39,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:03:39,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:39" (1/1) ... [2021-11-13 18:03:39,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f7e6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:39, skipping insertion in model container [2021-11-13 18:03:39,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:39" (1/1) ... [2021-11-13 18:03:39,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:03:39,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:03:39,865 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-13 18:03:39,876 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-13 18:03:39,985 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-13 18:03:39,987 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-13 18:03:39,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:40,009 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 18:03:40,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:03:40,056 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-13 18:03:40,058 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-13 18:03:40,148 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-13 18:03:40,149 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-13 18:03:40,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:40,159 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:03:40,191 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-13 18:03:40,194 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-13 18:03:40,256 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-13 18:03:40,257 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_3bcfe128-0377-467c-82c2-327bca0cd1e6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-13 18:03:40,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:40,358 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:03:40,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40 WrapperNode [2021-11-13 18:03:40,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:40,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:03:40,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:03:40,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:03:40,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (1/1) ... [2021-11-13 18:03:40,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (1/1) ... [2021-11-13 18:03:40,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (1/1) ... [2021-11-13 18:03:40,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (1/1) ... [2021-11-13 18:03:40,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (1/1) ... [2021-11-13 18:03:40,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (1/1) ... [2021-11-13 18:03:40,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (1/1) ... [2021-11-13 18:03:40,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:03:40,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:03:40,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:03:40,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:03:40,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (1/1) ... [2021-11-13 18:03:40,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:40,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:03:40,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:03:40,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:03:40,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:03:40,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-13 18:03:40,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 18:03:40,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 18:03:40,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-13 18:03:40,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-13 18:03:40,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-13 18:03:40,632 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 18:03:40,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 18:03:40,632 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-13 18:03:40,632 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-13 18:03:40,632 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_memcmp [2021-11-13 18:03:40,632 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-13 18:03:40,633 INFO L138 BoogieDeclarations]: Found implementation of procedure real_malloc [2021-11-13 18:03:40,633 INFO L138 BoogieDeclarations]: Found implementation of procedure real_free [2021-11-13 18:03:40,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:03:40,633 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:03:40,633 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-13 18:03:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-13 18:03:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-13 18:03:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-13 18:03:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 18:03:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-13 18:03:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-13 18:03:40,636 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-13 18:03:40,637 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-13 18:03:40,637 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-13 18:03:40,637 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-13 18:03:40,638 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-13 18:03:40,638 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-13 18:03:40,638 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-13 18:03:40,638 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-13 18:03:40,638 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-13 18:03:40,638 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-13 18:03:40,639 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-13 18:03:40,639 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-13 18:03:40,639 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-13 18:03:40,639 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-13 18:03:40,640 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-13 18:03:40,640 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-13 18:03:40,640 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-13 18:03:40,640 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-13 18:03:40,640 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-13 18:03:40,640 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-13 18:03:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-13 18:03:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-13 18:03:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-13 18:03:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-13 18:03:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-13 18:03:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-13 18:03:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-13 18:03:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-13 18:03:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-13 18:03:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-13 18:03:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-13 18:03:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-13 18:03:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-13 18:03:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-13 18:03:40,646 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-13 18:03:40,646 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-13 18:03:40,646 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-13 18:03:40,646 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-13 18:03:40,646 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-13 18:03:40,646 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-13 18:03:40,646 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-13 18:03:40,647 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-13 18:03:40,647 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-13 18:03:40,648 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-13 18:03:40,648 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 18:03:40,648 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 18:03:40,648 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 18:03:40,648 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 18:03:40,648 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 18:03:40,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 18:03:40,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 18:03:40,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 18:03:40,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 18:03:40,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 18:03:40,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 18:03:40,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 18:03:40,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 18:03:40,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 18:03:40,650 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 18:03:40,650 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 18:03:40,650 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 18:03:40,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 18:03:40,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-13 18:03:40,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-13 18:03:40,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-13 18:03:40,651 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 18:03:40,651 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 18:03:40,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 18:03:40,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 18:03:40,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 18:03:40,652 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 18:03:40,652 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 18:03:40,652 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 18:03:40,652 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 18:03:40,653 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 18:03:40,653 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 18:03:40,653 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 18:03:40,653 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 18:03:40,653 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 18:03:40,653 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 18:03:40,654 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 18:03:40,654 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 18:03:40,654 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 18:03:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 18:03:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 18:03:40,659 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 18:03:40,659 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 18:03:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 18:03:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 18:03:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 18:03:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 18:03:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 18:03:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 18:03:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 18:03:40,669 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 18:03:40,669 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 18:03:40,669 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 18:03:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 18:03:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 18:03:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 18:03:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 18:03:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 18:03:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 18:03:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 18:03:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 18:03:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 18:03:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 18:03:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 18:03:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 18:03:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 18:03:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 18:03:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 18:03:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 18:03:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 18:03:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 18:03:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 18:03:40,695 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 18:03:40,695 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 18:03:40,695 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 18:03:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 18:03:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 18:03:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 18:03:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 18:03:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 18:03:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 18:03:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 18:03:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 18:03:40,697 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 18:03:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 18:03:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 18:03:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 18:03:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 18:03:40,698 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 18:03:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 18:03:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 18:03:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 18:03:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 18:03:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 18:03:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 18:03:40,699 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 18:03:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 18:03:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 18:03:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 18:03:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 18:03:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 18:03:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 18:03:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 18:03:40,700 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 18:03:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 18:03:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 18:03:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 18:03:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 18:03:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 18:03:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 18:03:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2021-11-13 18:03:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2021-11-13 18:03:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2021-11-13 18:03:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2021-11-13 18:03:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2021-11-13 18:03:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2021-11-13 18:03:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2021-11-13 18:03:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2021-11-13 18:03:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2021-11-13 18:03:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2021-11-13 18:03:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2021-11-13 18:03:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2021-11-13 18:03:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2021-11-13 18:03:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2021-11-13 18:03:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2021-11-13 18:03:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2021-11-13 18:03:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2021-11-13 18:03:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2021-11-13 18:03:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2021-11-13 18:03:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2021-11-13 18:03:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2021-11-13 18:03:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2021-11-13 18:03:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2021-11-13 18:03:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2021-11-13 18:03:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2021-11-13 18:03:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2021-11-13 18:03:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2021-11-13 18:03:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2021-11-13 18:03:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2021-11-13 18:03:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2021-11-13 18:03:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2021-11-13 18:03:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2021-11-13 18:03:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2021-11-13 18:03:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2021-11-13 18:03:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2021-11-13 18:03:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2021-11-13 18:03:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2021-11-13 18:03:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2021-11-13 18:03:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2021-11-13 18:03:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2021-11-13 18:03:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2021-11-13 18:03:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2021-11-13 18:03:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2021-11-13 18:03:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2021-11-13 18:03:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2021-11-13 18:03:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2021-11-13 18:03:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2021-11-13 18:03:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2021-11-13 18:03:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2021-11-13 18:03:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2021-11-13 18:03:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2021-11-13 18:03:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2021-11-13 18:03:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2021-11-13 18:03:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2021-11-13 18:03:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2021-11-13 18:03:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2021-11-13 18:03:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2021-11-13 18:03:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2021-11-13 18:03:40,716 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2021-11-13 18:03:40,716 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2021-11-13 18:03:40,716 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2021-11-13 18:03:40,716 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2021-11-13 18:03:40,716 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2021-11-13 18:03:40,716 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2021-11-13 18:03:40,716 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2021-11-13 18:03:40,717 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2021-11-13 18:03:40,717 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2021-11-13 18:03:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2021-11-13 18:03:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2021-11-13 18:03:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2021-11-13 18:03:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2021-11-13 18:03:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2021-11-13 18:03:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-13 18:03:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2021-11-13 18:03:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2021-11-13 18:03:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2021-11-13 18:03:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2021-11-13 18:03:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2021-11-13 18:03:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2021-11-13 18:03:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2021-11-13 18:03:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2021-11-13 18:03:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2021-11-13 18:03:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2021-11-13 18:03:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2021-11-13 18:03:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2021-11-13 18:03:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2021-11-13 18:03:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2021-11-13 18:03:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2021-11-13 18:03:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2021-11-13 18:03:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2021-11-13 18:03:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2021-11-13 18:03:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2021-11-13 18:03:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2021-11-13 18:03:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2021-11-13 18:03:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2021-11-13 18:03:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2021-11-13 18:03:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2021-11-13 18:03:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2021-11-13 18:03:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2021-11-13 18:03:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2021-11-13 18:03:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 18:03:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:03:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 18:03:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-13 18:03:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:03:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:03:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-13 18:03:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:03:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:03:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure alt_memcmp [2021-11-13 18:03:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-13 18:03:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:03:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure real_malloc [2021-11-13 18:03:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure real_free [2021-11-13 18:03:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:03:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:03:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:03:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:03:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:03:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:03:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:03:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-13 18:03:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:03:41,384 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-13 18:03:46,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:03:46,521 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-13 18:03:46,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:46 BoogieIcfgContainer [2021-11-13 18:03:46,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:03:46,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:03:46,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:03:46,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:03:46,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:03:39" (1/3) ... [2021-11-13 18:03:46,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be521f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:03:46, skipping insertion in model container [2021-11-13 18:03:46,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:40" (2/3) ... [2021-11-13 18:03:46,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be521f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:03:46, skipping insertion in model container [2021-11-13 18:03:46,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:46" (3/3) ... [2021-11-13 18:03:46,541 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test6-1.i [2021-11-13 18:03:46,547 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:03:46,547 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 531 error locations. [2021-11-13 18:03:46,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:03:46,610 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 [2021-11-13 18:03:46,610 INFO L340 AbstractCegarLoop]: Starting to check reachability of 531 error locations. [2021-11-13 18:03:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 1099 states, 539 states have (on average 2.215213358070501) internal successors, (1194), 1070 states have internal predecessors, (1194), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:03:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:03:46,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:46,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:46,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:03:46,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:46,683 INFO L85 PathProgramCache]: Analyzing trace with hash 425203596, now seen corresponding path program 1 times [2021-11-13 18:03:46,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:46,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602917461] [2021-11-13 18:03:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:46,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:46,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:46,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:46,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:03:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:03:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:47,148 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 [2021-11-13 18:03:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:47,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:47,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:47,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602917461] [2021-11-13 18:03:47,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602917461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:47,205 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:47,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 18:03:47,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770096944] [2021-11-13 18:03:47,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:47,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:03:47,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:03:47,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:03:47,250 INFO L87 Difference]: Start difference. First operand has 1099 states, 539 states have (on average 2.215213358070501) internal successors, (1194), 1070 states have internal predecessors, (1194), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) 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) [2021-11-13 18:03:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:49,395 INFO L93 Difference]: Finished difference Result 1173 states and 1241 transitions. [2021-11-13 18:03:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:03:49,398 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 [2021-11-13 18:03:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:49,427 INFO L225 Difference]: With dead ends: 1173 [2021-11-13 18:03:49,427 INFO L226 Difference]: Without dead ends: 1170 [2021-11-13 18:03:49,429 INFO L932 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 [2021-11-13 18:03:49,433 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 703 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1634.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.79ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2031.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:49,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 1083 Invalid, 603 Unknown, 0 Unchecked, 18.79ms Time], IncrementalHoareTripleChecker [12 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 2031.63ms Time] [2021-11-13 18:03:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-11-13 18:03:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1119. [2021-11-13 18:03:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 573 states have (on average 2.075043630017452) internal successors, (1189), 1091 states have internal predecessors, (1189), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 18:03:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1226 transitions. [2021-11-13 18:03:49,569 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1226 transitions. Word has length 7 [2021-11-13 18:03:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:49,569 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1226 transitions. [2021-11-13 18:03:49,570 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) [2021-11-13 18:03:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1226 transitions. [2021-11-13 18:03:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:03:49,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:49,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:49,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:49,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:49,783 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:03:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 425203597, now seen corresponding path program 1 times [2021-11-13 18:03:49,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:49,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968250926] [2021-11-13 18:03:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:49,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:49,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:49,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:49,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:03:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:50,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:03:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:50,108 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 [2021-11-13 18:03:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:50,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:50,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:50,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968250926] [2021-11-13 18:03:50,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968250926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:50,191 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:50,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-13 18:03:50,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563376207] [2021-11-13 18:03:50,192 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:50,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:03:50,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:03:50,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:03:50,195 INFO L87 Difference]: Start difference. First operand 1119 states and 1226 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) [2021-11-13 18:03:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:55,602 INFO L93 Difference]: Finished difference Result 1539 states and 1642 transitions. [2021-11-13 18:03:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:03:55,603 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 [2021-11-13 18:03:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:55,613 INFO L225 Difference]: With dead ends: 1539 [2021-11-13 18:03:55,613 INFO L226 Difference]: Without dead ends: 1539 [2021-11-13 18:03:55,614 INFO L932 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 [2021-11-13 18:03:55,616 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 1103 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4655.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.09ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5309.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:55,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 1682 Invalid, 1119 Unknown, 0 Unchecked, 21.09ms Time], IncrementalHoareTripleChecker [16 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 5309.46ms Time] [2021-11-13 18:03:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-11-13 18:03:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1110. [2021-11-13 18:03:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 573 states have (on average 2.0575916230366493) internal successors, (1179), 1082 states have internal predecessors, (1179), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 18:03:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1216 transitions. [2021-11-13 18:03:55,666 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1216 transitions. Word has length 7 [2021-11-13 18:03:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:55,667 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1216 transitions. [2021-11-13 18:03:55,667 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) [2021-11-13 18:03:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1216 transitions. [2021-11-13 18:03:55,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:03:55,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:55,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:55,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:55,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:55,896 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr513ASSERT_VIOLATIONMEMORY_LEAK === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:03:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2052589616, now seen corresponding path program 1 times [2021-11-13 18:03:55,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:55,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640911250] [2021-11-13 18:03:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:55,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:55,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:55,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:55,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:03:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:03:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:56,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:56,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640911250] [2021-11-13 18:03:56,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640911250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:56,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:56,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:03:56,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290557411] [2021-11-13 18:03:56,359 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:56,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:03:56,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:56,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:03:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:03:56,360 INFO L87 Difference]: Start difference. First operand 1110 states and 1216 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) [2021-11-13 18:03:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:57,358 INFO L93 Difference]: Finished difference Result 1571 states and 1717 transitions. [2021-11-13 18:03:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:03:57,359 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 [2021-11-13 18:03:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:57,369 INFO L225 Difference]: With dead ends: 1571 [2021-11-13 18:03:57,369 INFO L226 Difference]: Without dead ends: 1571 [2021-11-13 18:03:57,370 INFO L932 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 [2021-11-13 18:03:57,371 INFO L933 BasicCegarLoop]: 1211 mSDtfsCounter, 560 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 793.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.33ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 925.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:57,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 3228 Invalid, 322 Unknown, 0 Unchecked, 17.33ms Time], IncrementalHoareTripleChecker [13 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 925.27ms Time] [2021-11-13 18:03:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-11-13 18:03:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1351. [2021-11-13 18:03:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 812 states have (on average 2.022167487684729) internal successors, (1642), 1321 states have internal predecessors, (1642), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:03:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1683 transitions. [2021-11-13 18:03:57,419 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1683 transitions. Word has length 15 [2021-11-13 18:03:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:57,420 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 1683 transitions. [2021-11-13 18:03:57,420 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) [2021-11-13 18:03:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1683 transitions. [2021-11-13 18:03:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:03:57,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:57,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:57,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:57,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:57,639 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr4REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:03:57,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2114460541, now seen corresponding path program 1 times [2021-11-13 18:03:57,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:57,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747830745] [2021-11-13 18:03:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:57,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:57,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:57,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:57,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:03:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:57,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:03:57,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:57,904 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 [2021-11-13 18:03:58,001 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-13 18:03:58,002 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 15 treesize of output 20 [2021-11-13 18:03:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:58,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:58,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:58,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747830745] [2021-11-13 18:03:58,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747830745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:58,237 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:58,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 5 [2021-11-13 18:03:58,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673575975] [2021-11-13 18:03:58,237 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:58,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:03:58,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:03:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:03:58,239 INFO L87 Difference]: Start difference. First operand 1351 states and 1683 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:04:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:00,137 INFO L93 Difference]: Finished difference Result 1400 states and 1693 transitions. [2021-11-13 18:04:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:04:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2021-11-13 18:04:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:00,145 INFO L225 Difference]: With dead ends: 1400 [2021-11-13 18:04:00,145 INFO L226 Difference]: Without dead ends: 1400 [2021-11-13 18:04:00,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:00,147 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 692 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1527.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.58ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 606 IncrementalHoareTripleChecker+Unchecked, 1821.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:00,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 1781 Invalid, 1190 Unknown, 0 Unchecked, 14.58ms Time], IncrementalHoareTripleChecker [3 Valid, 581 Invalid, 0 Unknown, 606 Unchecked, 1821.85ms Time] [2021-11-13 18:04:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-13 18:04:00,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1350. [2021-11-13 18:04:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 812 states have (on average 2.019704433497537) internal successors, (1640), 1320 states have internal predecessors, (1640), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:04:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1681 transitions. [2021-11-13 18:04:00,186 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1681 transitions. Word has length 16 [2021-11-13 18:04:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:00,186 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 1681 transitions. [2021-11-13 18:04:00,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:04:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1681 transitions. [2021-11-13 18:04:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:04:00,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:00,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:00,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:00,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:00,400 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr5REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:04:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2114460542, now seen corresponding path program 1 times [2021-11-13 18:04:00,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:00,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437128432] [2021-11-13 18:04:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:00,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:00,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:00,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:04:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:00,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:04:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:00,652 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 [2021-11-13 18:04:00,661 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 [2021-11-13 18:04:04,890 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-13 18:04:04,891 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 33 treesize of output 35 [2021-11-13 18:04:04,903 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:04:04,904 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 27 treesize of output 27 [2021-11-13 18:04:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:04,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:15,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:15,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437128432] [2021-11-13 18:04:15,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437128432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:15,631 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:15,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-13 18:04:15,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285704427] [2021-11-13 18:04:15,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:15,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:04:15,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:04:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=62, Unknown=5, NotChecked=0, Total=90 [2021-11-13 18:04:15,633 INFO L87 Difference]: Start difference. First operand 1350 states and 1681 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:04:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:23,604 INFO L93 Difference]: Finished difference Result 2201 states and 2641 transitions. [2021-11-13 18:04:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:04:23,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-11-13 18:04:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:23,616 INFO L225 Difference]: With dead ends: 2201 [2021-11-13 18:04:23,616 INFO L226 Difference]: Without dead ends: 2201 [2021-11-13 18:04:23,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=23, Invalid=62, Unknown=5, NotChecked=0, Total=90 [2021-11-13 18:04:23,618 INFO L933 BasicCegarLoop]: 794 mSDtfsCounter, 2306 mSDsluCounter, 2783 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6790.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 5286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.75ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2902 IncrementalHoareTripleChecker+Unchecked, 7840.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:23,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2321 Valid, 3577 Invalid, 5286 Unknown, 0 Unchecked, 31.75ms Time], IncrementalHoareTripleChecker [38 Valid, 2346 Invalid, 0 Unknown, 2902 Unchecked, 7840.74ms Time] [2021-11-13 18:04:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-11-13 18:04:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1350. [2021-11-13 18:04:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 812 states have (on average 2.018472906403941) internal successors, (1639), 1320 states have internal predecessors, (1639), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:04:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1680 transitions. [2021-11-13 18:04:23,660 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1680 transitions. Word has length 16 [2021-11-13 18:04:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:23,660 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 1680 transitions. [2021-11-13 18:04:23,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:04:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1680 transitions. [2021-11-13 18:04:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:04:23,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:23,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:23,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:23,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:23,874 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr6REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:04:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1123767419, now seen corresponding path program 1 times [2021-11-13 18:04:23,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:23,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114801869] [2021-11-13 18:04:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:23,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:23,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:23,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:23,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:04:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:04:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:24,140 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 [2021-11-13 18:04:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:24,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:24,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:24,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114801869] [2021-11-13 18:04:24,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114801869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:24,260 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:24,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:04:24,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370564509] [2021-11-13 18:04:24,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:24,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:04:24,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:04:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:04:24,262 INFO L87 Difference]: Start difference. First operand 1350 states and 1680 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:04:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:28,044 INFO L93 Difference]: Finished difference Result 1757 states and 2206 transitions. [2021-11-13 18:04:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:04:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-13 18:04:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:28,054 INFO L225 Difference]: With dead ends: 1757 [2021-11-13 18:04:28,054 INFO L226 Difference]: Without dead ends: 1757 [2021-11-13 18:04:28,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:04:28,056 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 945 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3180.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.41ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3722.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:28,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 2851 Invalid, 2207 Unknown, 0 Unchecked, 17.41ms Time], IncrementalHoareTripleChecker [49 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 3722.23ms Time] [2021-11-13 18:04:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-11-13 18:04:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1305. [2021-11-13 18:04:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 812 states have (on average 1.9532019704433496) internal successors, (1586), 1275 states have internal predecessors, (1586), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:04:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1627 transitions. [2021-11-13 18:04:28,092 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1627 transitions. Word has length 17 [2021-11-13 18:04:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:28,093 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 1627 transitions. [2021-11-13 18:04:28,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:04:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1627 transitions. [2021-11-13 18:04:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:04:28,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:28,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:28,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:28,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:28,306 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:04:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:28,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1123767420, now seen corresponding path program 1 times [2021-11-13 18:04:28,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:28,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156303596] [2021-11-13 18:04:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:28,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:28,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:28,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:28,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:04:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:04:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:28,589 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 [2021-11-13 18:04:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:28,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:29,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:29,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156303596] [2021-11-13 18:04:29,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156303596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:29,036 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:29,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-13 18:04:29,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67318880] [2021-11-13 18:04:29,036 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:29,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:04:29,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:04:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:04:29,038 INFO L87 Difference]: Start difference. First operand 1305 states and 1627 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:04:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:40,062 INFO L93 Difference]: Finished difference Result 1872 states and 2341 transitions. [2021-11-13 18:04:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:04:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2021-11-13 18:04:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:40,071 INFO L225 Difference]: With dead ends: 1872 [2021-11-13 18:04:40,072 INFO L226 Difference]: Without dead ends: 1872 [2021-11-13 18:04:40,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:04:40,073 INFO L933 BasicCegarLoop]: 1270 mSDtfsCounter, 1335 mSDsluCounter, 2968 mSDsCounter, 0 mSdLazyCounter, 2984 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9794.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 4238 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.40ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10946.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:40,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 4238 Invalid, 3001 Unknown, 0 Unchecked, 20.40ms Time], IncrementalHoareTripleChecker [17 Valid, 2984 Invalid, 0 Unknown, 0 Unchecked, 10946.58ms Time] [2021-11-13 18:04:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-11-13 18:04:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1295. [2021-11-13 18:04:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 812 states have (on average 1.9310344827586208) internal successors, (1568), 1265 states have internal predecessors, (1568), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:04:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1609 transitions. [2021-11-13 18:04:40,108 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1609 transitions. Word has length 17 [2021-11-13 18:04:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:40,109 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1609 transitions. [2021-11-13 18:04:40,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:04:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1609 transitions. [2021-11-13 18:04:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:04:40,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:40,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:40,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:40,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:40,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:04:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:40,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1247582932, now seen corresponding path program 1 times [2021-11-13 18:04:40,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:40,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713865725] [2021-11-13 18:04:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:40,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:40,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:40,324 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:40,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:04:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:04:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:40,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:04:40,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:04:40,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:04:40,676 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-13 18:04:40,676 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 [2021-11-13 18:04:40,731 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-13 18:04:40,731 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 [2021-11-13 18:04:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:40,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:40,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:40,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713865725] [2021-11-13 18:04:40,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713865725] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:40,825 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:40,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:04:40,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193611147] [2021-11-13 18:04:40,826 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:40,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:04:40,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:40,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:04:40,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:40,826 INFO L87 Difference]: Start difference. First operand 1295 states and 1609 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:04:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:42,349 INFO L93 Difference]: Finished difference Result 1647 states and 2027 transitions. [2021-11-13 18:04:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:04:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-13 18:04:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:42,358 INFO L225 Difference]: With dead ends: 1647 [2021-11-13 18:04:42,358 INFO L226 Difference]: Without dead ends: 1647 [2021-11-13 18:04:42,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:04:42,359 INFO L933 BasicCegarLoop]: 1045 mSDtfsCounter, 688 mSDsluCounter, 3001 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1282.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 4046 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.16ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1473.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:42,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 4046 Invalid, 328 Unknown, 0 Unchecked, 6.16ms Time], IncrementalHoareTripleChecker [12 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1473.17ms Time] [2021-11-13 18:04:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-11-13 18:04:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1294. [2021-11-13 18:04:42,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 811 states have (on average 1.9309494451294698) internal successors, (1566), 1264 states have internal predecessors, (1566), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:04:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1607 transitions. [2021-11-13 18:04:42,393 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1607 transitions. Word has length 18 [2021-11-13 18:04:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:42,394 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 1607 transitions. [2021-11-13 18:04:42,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:04:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1607 transitions. [2021-11-13 18:04:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:04:42,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:42,397 INFO L514 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] [2021-11-13 18:04:42,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:42,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:42,614 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:04:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash 931004775, now seen corresponding path program 1 times [2021-11-13 18:04:42,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:42,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252463807] [2021-11-13 18:04:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:42,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:42,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:42,615 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:42,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:04:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:04:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:42,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:42,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:42,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252463807] [2021-11-13 18:04:42,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252463807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:42,981 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:42,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:04:42,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197055417] [2021-11-13 18:04:42,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:42,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:04:42,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:42,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:04:42,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:42,982 INFO L87 Difference]: Start difference. First operand 1294 states and 1607 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:04:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:43,013 INFO L93 Difference]: Finished difference Result 1234 states and 1521 transitions. [2021-11-13 18:04:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:04:43,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-11-13 18:04:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:43,023 INFO L225 Difference]: With dead ends: 1234 [2021-11-13 18:04:43,023 INFO L226 Difference]: Without dead ends: 1234 [2021-11-13 18:04:43,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:43,027 INFO L933 BasicCegarLoop]: 1038 mSDtfsCounter, 941 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:43,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 1222 Invalid, 12 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 15.76ms Time] [2021-11-13 18:04:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-11-13 18:04:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1234. [2021-11-13 18:04:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 775 states have (on average 1.9096774193548387) internal successors, (1480), 1204 states have internal predecessors, (1480), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:04:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1521 transitions. [2021-11-13 18:04:43,058 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1521 transitions. Word has length 27 [2021-11-13 18:04:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:43,060 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1521 transitions. [2021-11-13 18:04:43,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:04:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1521 transitions. [2021-11-13 18:04:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 18:04:43,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:43,065 INFO L514 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] [2021-11-13 18:04:43,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:43,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:43,277 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr38REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:04:43,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1342390241, now seen corresponding path program 1 times [2021-11-13 18:04:43,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:43,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574831230] [2021-11-13 18:04:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:43,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:43,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:43,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:43,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:04:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:04:43,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:43,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:43,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:43,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574831230] [2021-11-13 18:04:43,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574831230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:43,695 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:43,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 18:04:43,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227934426] [2021-11-13 18:04:43,695 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:43,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:04:43,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:04:43,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:04:43,696 INFO L87 Difference]: Start difference. First operand 1234 states and 1521 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:04:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:43,821 INFO L93 Difference]: Finished difference Result 1206 states and 1465 transitions. [2021-11-13 18:04:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:04:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-13 18:04:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:43,828 INFO L225 Difference]: With dead ends: 1206 [2021-11-13 18:04:43,828 INFO L226 Difference]: Without dead ends: 1206 [2021-11-13 18:04:43,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:43,829 INFO L933 BasicCegarLoop]: 993 mSDtfsCounter, 1814 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.87ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:43,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1829 Valid, 2072 Invalid, 89 Unknown, 0 Unchecked, 5.87ms Time], IncrementalHoareTripleChecker [57 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 94.57ms Time] [2021-11-13 18:04:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-11-13 18:04:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1204. [2021-11-13 18:04:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 759 states have (on average 1.8735177865612649) internal successors, (1422), 1174 states have internal predecessors, (1422), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:04:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1463 transitions. [2021-11-13 18:04:43,854 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1463 transitions. Word has length 29 [2021-11-13 18:04:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:43,855 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1463 transitions. [2021-11-13 18:04:43,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:04:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1463 transitions. [2021-11-13 18:04:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:04:43,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:43,857 INFO L514 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] [2021-11-13 18:04:43,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:44,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:44,068 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr52REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:04:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash -912919761, now seen corresponding path program 1 times [2021-11-13 18:04:44,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:44,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131469704] [2021-11-13 18:04:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:44,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:44,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:44,074 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:44,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:04:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:44,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:04:44,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:44,352 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 [2021-11-13 18:04:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:44,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:44,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:44,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131469704] [2021-11-13 18:04:44,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131469704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:44,657 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:44,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:04:44,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330751803] [2021-11-13 18:04:44,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:44,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:04:44,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:04:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:44,658 INFO L87 Difference]: Start difference. First operand 1204 states and 1463 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:04:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:49,474 INFO L93 Difference]: Finished difference Result 2145 states and 2624 transitions. [2021-11-13 18:04:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:04:49,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-11-13 18:04:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:49,484 INFO L225 Difference]: With dead ends: 2145 [2021-11-13 18:04:49,484 INFO L226 Difference]: Without dead ends: 2145 [2021-11-13 18:04:49,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:04:49,485 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 1400 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4058.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.25ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4734.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:49,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1407 Valid, 3147 Invalid, 2852 Unknown, 0 Unchecked, 18.25ms Time], IncrementalHoareTripleChecker [11 Valid, 2841 Invalid, 0 Unknown, 0 Unchecked, 4734.59ms Time] [2021-11-13 18:04:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-11-13 18:04:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1200. [2021-11-13 18:04:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 759 states have (on average 1.8629776021080369) internal successors, (1414), 1170 states have internal predecessors, (1414), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:04:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1455 transitions. [2021-11-13 18:04:49,513 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1455 transitions. Word has length 43 [2021-11-13 18:04:49,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:49,514 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1455 transitions. [2021-11-13 18:04:49,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:04:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1455 transitions. [2021-11-13 18:04:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:04:49,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:49,515 INFO L514 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] [2021-11-13 18:04:49,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:49,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:49,732 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr53REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:04:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash -912919760, now seen corresponding path program 1 times [2021-11-13 18:04:49,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:49,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001545408] [2021-11-13 18:04:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:49,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:49,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:49,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:04:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:04:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:50,009 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 [2021-11-13 18:04:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:50,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:51,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:51,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001545408] [2021-11-13 18:04:51,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001545408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:51,020 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:51,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-13 18:04:51,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588292003] [2021-11-13 18:04:51,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:04:51,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:04:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:51,022 INFO L87 Difference]: Start difference. First operand 1200 states and 1455 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:05:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:03,975 INFO L93 Difference]: Finished difference Result 1783 states and 2191 transitions. [2021-11-13 18:05:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:05:03,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-11-13 18:05:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:03,985 INFO L225 Difference]: With dead ends: 1783 [2021-11-13 18:05:03,985 INFO L226 Difference]: Without dead ends: 1783 [2021-11-13 18:05:03,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:05:03,986 INFO L933 BasicCegarLoop]: 1237 mSDtfsCounter, 1697 mSDsluCounter, 3792 mSDsCounter, 0 mSdLazyCounter, 3739 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11408.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 5029 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.86ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12761.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:03,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1700 Valid, 5029 Invalid, 3759 Unknown, 0 Unchecked, 21.86ms Time], IncrementalHoareTripleChecker [20 Valid, 3739 Invalid, 0 Unknown, 0 Unchecked, 12761.19ms Time] [2021-11-13 18:05:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-11-13 18:05:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1196. [2021-11-13 18:05:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 759 states have (on average 1.8524374176548088) internal successors, (1406), 1166 states have internal predecessors, (1406), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:05:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1447 transitions. [2021-11-13 18:05:04,014 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1447 transitions. Word has length 43 [2021-11-13 18:05:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:04,014 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1447 transitions. [2021-11-13 18:05:04,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:05:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1447 transitions. [2021-11-13 18:05:04,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:05:04,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:04,017 INFO L514 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] [2021-11-13 18:05:04,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:04,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:04,230 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_mallocErr0REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:05:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash 424260162, now seen corresponding path program 1 times [2021-11-13 18:05:04,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:04,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187384666] [2021-11-13 18:05:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:04,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:04,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:04,233 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:04,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:05:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:05:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:04,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:04,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:04,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187384666] [2021-11-13 18:05:04,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187384666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:04,833 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:04,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:05:04,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555671757] [2021-11-13 18:05:04,834 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:04,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:05:04,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:05:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:05:04,835 INFO L87 Difference]: Start difference. First operand 1196 states and 1447 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:05:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:04,885 INFO L93 Difference]: Finished difference Result 1184 states and 1427 transitions. [2021-11-13 18:05:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:05:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2021-11-13 18:05:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:04,895 INFO L225 Difference]: With dead ends: 1184 [2021-11-13 18:05:04,895 INFO L226 Difference]: Without dead ends: 1184 [2021-11-13 18:05:04,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:05:04,896 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 888 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:04,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 2050 Invalid, 41 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 35.05ms Time] [2021-11-13 18:05:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-11-13 18:05:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1184. [2021-11-13 18:05:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 747 states have (on average 1.855421686746988) internal successors, (1386), 1154 states have internal predecessors, (1386), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:05:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1427 transitions. [2021-11-13 18:05:04,918 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1427 transitions. Word has length 62 [2021-11-13 18:05:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:04,919 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1427 transitions. [2021-11-13 18:05:04,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:05:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1427 transitions. [2021-11-13 18:05:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 18:05:04,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:04,920 INFO L514 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] [2021-11-13 18:05:04,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:05,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:05,133 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting alt_mallocErr0REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:05:05,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:05,134 INFO L85 PathProgramCache]: Analyzing trace with hash 100606198, now seen corresponding path program 1 times [2021-11-13 18:05:05,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:05,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363181438] [2021-11-13 18:05:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:05,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:05,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:05,136 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:05,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:05:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:05,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:05:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:05,660 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-13 18:05:05,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-13 18:05:05,858 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-13 18:05:05,858 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 14 treesize of output 19 [2021-11-13 18:05:05,908 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:05:05,909 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 18 treesize of output 14 [2021-11-13 18:05:05,954 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-13 18:05:05,954 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 3 case distinctions, treesize of input 25 treesize of output 36 [2021-11-13 18:05:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:06,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:14,835 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:14,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363181438] [2021-11-13 18:05:14,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363181438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:14,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:14,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-13 18:05:14,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091554702] [2021-11-13 18:05:14,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:14,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:05:14,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:05:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=66, Unknown=4, NotChecked=0, Total=110 [2021-11-13 18:05:14,837 INFO L87 Difference]: Start difference. First operand 1184 states and 1427 transitions. Second operand has 11 states, 10 states have (on average 7.3) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:05:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:16,838 INFO L93 Difference]: Finished difference Result 1205 states and 1449 transitions. [2021-11-13 18:05:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:05:16,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.3) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 70 [2021-11-13 18:05:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:16,845 INFO L225 Difference]: With dead ends: 1205 [2021-11-13 18:05:16,845 INFO L226 Difference]: Without dead ends: 1205 [2021-11-13 18:05:16,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=46, Invalid=82, Unknown=4, NotChecked=0, Total=132 [2021-11-13 18:05:16,847 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 113 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1674.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 3229 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.21ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 942 IncrementalHoareTripleChecker+Unchecked, 1951.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:16,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 3229 Invalid, 1895 Unknown, 0 Unchecked, 7.21ms Time], IncrementalHoareTripleChecker [14 Valid, 939 Invalid, 0 Unknown, 942 Unchecked, 1951.22ms Time] [2021-11-13 18:05:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-11-13 18:05:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1202. [2021-11-13 18:05:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 760 states have (on average 1.8447368421052632) internal successors, (1402), 1169 states have internal predecessors, (1402), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (23), 20 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-13 18:05:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1448 transitions. [2021-11-13 18:05:16,869 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1448 transitions. Word has length 70 [2021-11-13 18:05:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:16,870 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 1448 transitions. [2021-11-13 18:05:16,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.3) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:05:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1448 transitions. [2021-11-13 18:05:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 18:05:16,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:16,871 INFO L514 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] [2021-11-13 18:05:16,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:17,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:17,085 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting alt_mallocErr1REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:05:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:17,086 INFO L85 PathProgramCache]: Analyzing trace with hash 100606199, now seen corresponding path program 1 times [2021-11-13 18:05:17,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:17,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516505296] [2021-11-13 18:05:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:17,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:17,088 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:17,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:05:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:05:17,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:17,595 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-13 18:05:17,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 42 [2021-11-13 18:05:17,656 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-13 18:05:17,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 63 [2021-11-13 18:05:18,007 INFO L354 Elim1Store]: treesize reduction -2, result has 108.0 percent of original size [2021-11-13 18:05:18,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 64 [2021-11-13 18:05:18,047 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-13 18:05:18,047 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 3 case distinctions, treesize of input 58 treesize of output 65 [2021-11-13 18:05:18,282 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:05:18,282 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 11 treesize of output 11 [2021-11-13 18:05:18,394 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-13 18:05:18,395 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 3 case distinctions, treesize of input 17 treesize of output 30 [2021-11-13 18:05:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:23,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:35,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:35,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516505296] [2021-11-13 18:05:35,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516505296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:35,069 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:35,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 13 [2021-11-13 18:05:35,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738405144] [2021-11-13 18:05:35,070 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:35,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:05:35,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:35,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:05:35,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=130, Unknown=2, NotChecked=0, Total=182 [2021-11-13 18:05:35,071 INFO L87 Difference]: Start difference. First operand 1202 states and 1448 transitions. Second operand has 14 states, 13 states have (on average 9.846153846153847) internal successors, (128), 11 states have internal predecessors, (128), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:05:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:42,415 INFO L93 Difference]: Finished difference Result 1202 states and 1447 transitions. [2021-11-13 18:05:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:05:42,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 9.846153846153847) internal successors, (128), 11 states have internal predecessors, (128), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 70 [2021-11-13 18:05:42,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:42,421 INFO L225 Difference]: With dead ends: 1202 [2021-11-13 18:05:42,421 INFO L226 Difference]: Without dead ends: 1202 [2021-11-13 18:05:42,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=67, Invalid=171, Unknown=2, NotChecked=0, Total=240 [2021-11-13 18:05:42,422 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 83 mSDsluCounter, 3689 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6472.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 4656 SdHoareTripleChecker+Invalid, 3697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.41ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1614 IncrementalHoareTripleChecker+Unchecked, 7193.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:42,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 4656 Invalid, 3697 Unknown, 0 Unchecked, 17.41ms Time], IncrementalHoareTripleChecker [5 Valid, 2078 Invalid, 0 Unknown, 1614 Unchecked, 7193.09ms Time] [2021-11-13 18:05:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-11-13 18:05:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1202. [2021-11-13 18:05:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 760 states have (on average 1.8434210526315788) internal successors, (1401), 1169 states have internal predecessors, (1401), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (23), 20 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-13 18:05:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1447 transitions. [2021-11-13 18:05:42,443 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1447 transitions. Word has length 70 [2021-11-13 18:05:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:42,444 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 1447 transitions. [2021-11-13 18:05:42,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 9.846153846153847) internal successors, (128), 11 states have internal predecessors, (128), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:05:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1447 transitions. [2021-11-13 18:05:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 18:05:42,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:42,445 INFO L514 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] [2021-11-13 18:05:42,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:42,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:42,660 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:05:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1177466420, now seen corresponding path program 1 times [2021-11-13 18:05:42,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:42,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366038670] [2021-11-13 18:05:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:42,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:42,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:42,663 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:42,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:05:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:05:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:43,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:43,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:43,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366038670] [2021-11-13 18:05:43,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366038670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:43,300 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:43,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 18:05:43,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580396499] [2021-11-13 18:05:43,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:43,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:05:43,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:05:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:05:43,302 INFO L87 Difference]: Start difference. First operand 1202 states and 1447 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:05:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:43,419 INFO L93 Difference]: Finished difference Result 1216 states and 1460 transitions. [2021-11-13 18:05:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:05:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2021-11-13 18:05:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:43,426 INFO L225 Difference]: With dead ends: 1216 [2021-11-13 18:05:43,426 INFO L226 Difference]: Without dead ends: 1216 [2021-11-13 18:05:43,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:05:43,427 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 20 mSDsluCounter, 5884 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6867 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.67ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:43,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 6867 Invalid, 57 Unknown, 0 Unchecked, 3.67ms Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 88.24ms Time] [2021-11-13 18:05:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-13 18:05:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1209. [2021-11-13 18:05:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 766 states have (on average 1.8394255874673628) internal successors, (1409), 1175 states have internal predecessors, (1409), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-13 18:05:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1455 transitions. [2021-11-13 18:05:43,448 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1455 transitions. Word has length 76 [2021-11-13 18:05:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:43,449 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 1455 transitions. [2021-11-13 18:05:43,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:05:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1455 transitions. [2021-11-13 18:05:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 18:05:43,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:43,450 INFO L514 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] [2021-11-13 18:05:43,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:43,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:43,664 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr70REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:05:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:43,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1131306924, now seen corresponding path program 1 times [2021-11-13 18:05:43,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:43,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996540895] [2021-11-13 18:05:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:43,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:43,667 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:43,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 18:05:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:05:43,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:44,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:44,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:44,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996540895] [2021-11-13 18:05:44,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996540895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:44,499 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:44,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-13 18:05:44,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427084656] [2021-11-13 18:05:44,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:44,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:05:44,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:05:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:05:44,501 INFO L87 Difference]: Start difference. First operand 1209 states and 1455 transitions. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 7 states have internal predecessors, (77), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:05:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:44,767 INFO L93 Difference]: Finished difference Result 1253 states and 1502 transitions. [2021-11-13 18:05:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:05:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 7 states have internal predecessors, (77), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2021-11-13 18:05:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:44,773 INFO L225 Difference]: With dead ends: 1253 [2021-11-13 18:05:44,773 INFO L226 Difference]: Without dead ends: 1250 [2021-11-13 18:05:44,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:05:44,774 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 178 mSDsluCounter, 3726 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 199.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 4707 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.36ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 238.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:44,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 4707 Invalid, 203 Unknown, 0 Unchecked, 4.36ms Time], IncrementalHoareTripleChecker [31 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 238.45ms Time] [2021-11-13 18:05:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-13 18:05:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1209. [2021-11-13 18:05:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 766 states have (on average 1.8381201044386424) internal successors, (1408), 1174 states have internal predecessors, (1408), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-13 18:05:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1454 transitions. [2021-11-13 18:05:44,796 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1454 transitions. Word has length 76 [2021-11-13 18:05:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:44,796 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 1454 transitions. [2021-11-13 18:05:44,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 7 states have internal predecessors, (77), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:05:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1454 transitions. [2021-11-13 18:05:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 18:05:44,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:44,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:44,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:45,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:45,012 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr70REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:05:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1926584220, now seen corresponding path program 1 times [2021-11-13 18:05:45,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:45,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897519675] [2021-11-13 18:05:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:45,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:45,014 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:45,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 18:05:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:05:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:45,423 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 [2021-11-13 18:05:45,665 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-13 18:05:45,665 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 16 treesize of output 21 [2021-11-13 18:05:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:45,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:46,040 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:46,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897519675] [2021-11-13 18:05:46,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897519675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:46,041 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:46,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 7 [2021-11-13 18:05:46,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807687842] [2021-11-13 18:05:46,041 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:46,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:05:46,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:46,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:05:46,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:05:46,043 INFO L87 Difference]: Start difference. First operand 1209 states and 1454 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 18:05:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:48,759 INFO L93 Difference]: Finished difference Result 1661 states and 2032 transitions. [2021-11-13 18:05:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:05:48,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 81 [2021-11-13 18:05:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:48,765 INFO L225 Difference]: With dead ends: 1661 [2021-11-13 18:05:48,765 INFO L226 Difference]: Without dead ends: 1661 [2021-11-13 18:05:48,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:05:48,766 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 800 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2293.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.09ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 2677.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:48,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 2349 Invalid, 2362 Unknown, 0 Unchecked, 8.09ms Time], IncrementalHoareTripleChecker [4 Valid, 1661 Invalid, 0 Unknown, 697 Unchecked, 2677.53ms Time] [2021-11-13 18:05:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-11-13 18:05:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1208. [2021-11-13 18:05:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 766 states have (on average 1.8368146214099217) internal successors, (1407), 1173 states have internal predecessors, (1407), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-13 18:05:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1453 transitions. [2021-11-13 18:05:48,782 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1453 transitions. Word has length 81 [2021-11-13 18:05:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:48,783 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1453 transitions. [2021-11-13 18:05:48,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 18:05:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1453 transitions. [2021-11-13 18:05:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 18:05:48,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:48,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:48,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:48,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:48,999 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr71REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:05:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:48,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1926584219, now seen corresponding path program 1 times [2021-11-13 18:05:49,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:49,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132515389] [2021-11-13 18:05:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:49,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:49,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:49,001 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:49,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 18:05:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:05:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:49,448 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 [2021-11-13 18:05:49,454 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 [2021-11-13 18:05:52,156 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-13 18:05:52,156 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 29 treesize of output 31 [2021-11-13 18:05:52,165 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:05:52,166 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 23 treesize of output 23 [2021-11-13 18:05:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:52,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:19,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-11-13 18:06:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:19,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:19,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132515389] [2021-11-13 18:06:19,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132515389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:19,904 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:19,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-13 18:06:19,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224141779] [2021-11-13 18:06:19,904 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:19,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:06:19,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:06:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=139, Unknown=10, NotChecked=0, Total=182 [2021-11-13 18:06:19,906 INFO L87 Difference]: Start difference. First operand 1208 states and 1453 transitions. Second operand has 14 states, 13 states have (on average 10.384615384615385) internal successors, (135), 10 states have internal predecessors, (135), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 18:06:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:26,595 INFO L93 Difference]: Finished difference Result 2187 states and 2711 transitions. [2021-11-13 18:06:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:06:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 10.384615384615385) internal successors, (135), 10 states have internal predecessors, (135), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 81 [2021-11-13 18:06:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:26,614 INFO L225 Difference]: With dead ends: 2187 [2021-11-13 18:06:26,614 INFO L226 Difference]: Without dead ends: 2187 [2021-11-13 18:06:26,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=33, Invalid=139, Unknown=10, NotChecked=0, Total=182 [2021-11-13 18:06:26,615 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 2299 mSDsluCounter, 3670 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5681.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2311 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 8379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.16ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6174 IncrementalHoareTripleChecker+Unchecked, 6591.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:26,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2311 Valid, 4383 Invalid, 8379 Unknown, 0 Unchecked, 24.16ms Time], IncrementalHoareTripleChecker [52 Valid, 2153 Invalid, 0 Unknown, 6174 Unchecked, 6591.98ms Time] [2021-11-13 18:06:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-11-13 18:06:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1176. [2021-11-13 18:06:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 768 states have (on average 1.7903645833333333) internal successors, (1375), 1141 states have internal predecessors, (1375), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-13 18:06:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1421 transitions. [2021-11-13 18:06:26,652 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1421 transitions. Word has length 81 [2021-11-13 18:06:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:26,652 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 1421 transitions. [2021-11-13 18:06:26,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 10.384615384615385) internal successors, (135), 10 states have internal predecessors, (135), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 18:06:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1421 transitions. [2021-11-13 18:06:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:06:26,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:26,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:26,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:26,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:26,875 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting alt_bzeroErr0REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:06:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:26,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1266922358, now seen corresponding path program 1 times [2021-11-13 18:06:26,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:26,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382206985] [2021-11-13 18:06:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:26,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:26,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:26,877 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:26,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 18:06:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:27,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:06:27,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:27,352 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 [2021-11-13 18:06:27,396 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 [2021-11-13 18:06:27,440 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 29 treesize of output 17 [2021-11-13 18:06:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:27,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:27,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:27,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382206985] [2021-11-13 18:06:27,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382206985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:27,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:27,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-13 18:06:27,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789490737] [2021-11-13 18:06:27,724 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:27,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:06:27,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:06:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:06:27,725 INFO L87 Difference]: Start difference. First operand 1176 states and 1421 transitions. Second operand has 8 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:06:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:32,090 INFO L93 Difference]: Finished difference Result 1182 states and 1427 transitions. [2021-11-13 18:06:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:06:32,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 88 [2021-11-13 18:06:32,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:32,103 INFO L225 Difference]: With dead ends: 1182 [2021-11-13 18:06:32,103 INFO L226 Difference]: Without dead ends: 1182 [2021-11-13 18:06:32,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:06:32,104 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 9 mSDsluCounter, 3059 mSDsCounter, 0 mSdLazyCounter, 2651 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3687.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4006 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.32ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4273.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:32,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4006 Invalid, 2654 Unknown, 0 Unchecked, 12.32ms Time], IncrementalHoareTripleChecker [3 Valid, 2651 Invalid, 0 Unknown, 0 Unchecked, 4273.34ms Time] [2021-11-13 18:06:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-11-13 18:06:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1181. [2021-11-13 18:06:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 772 states have (on average 1.7862694300518134) internal successors, (1379), 1144 states have internal predecessors, (1379), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2021-11-13 18:06:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1427 transitions. [2021-11-13 18:06:32,125 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1427 transitions. Word has length 88 [2021-11-13 18:06:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:32,125 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1427 transitions. [2021-11-13 18:06:32,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:06:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1427 transitions. [2021-11-13 18:06:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:06:32,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:32,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:32,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-13 18:06:32,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:32,327 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting alt_bzeroErr1REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:06:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1266922357, now seen corresponding path program 1 times [2021-11-13 18:06:32,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:32,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420279249] [2021-11-13 18:06:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:32,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:32,329 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:32,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 18:06:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:06:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:32,872 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 [2021-11-13 18:06:32,912 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 [2021-11-13 18:06:32,919 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 [2021-11-13 18:06:32,974 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 [2021-11-13 18:06:32,978 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 [2021-11-13 18:06:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:33,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:33,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:33,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420279249] [2021-11-13 18:06:33,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420279249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:33,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:33,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-13 18:06:33,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196647807] [2021-11-13 18:06:33,857 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:33,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:06:33,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:33,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:06:33,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:06:33,858 INFO L87 Difference]: Start difference. First operand 1181 states and 1427 transitions. Second operand has 16 states, 13 states have (on average 7.0) internal successors, (91), 12 states have internal predecessors, (91), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 18:06:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:49,967 INFO L93 Difference]: Finished difference Result 1183 states and 1426 transitions. [2021-11-13 18:06:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:06:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 7.0) internal successors, (91), 12 states have internal predecessors, (91), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 88 [2021-11-13 18:06:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:49,971 INFO L225 Difference]: With dead ends: 1183 [2021-11-13 18:06:49,971 INFO L226 Difference]: Without dead ends: 1183 [2021-11-13 18:06:49,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:06:49,972 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 33 mSDsluCounter, 5576 mSDsCounter, 0 mSdLazyCounter, 3991 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14077.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 4002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.56ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15677.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:49,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 6522 Invalid, 4002 Unknown, 0 Unchecked, 23.56ms Time], IncrementalHoareTripleChecker [11 Valid, 3991 Invalid, 0 Unknown, 0 Unchecked, 15677.89ms Time] [2021-11-13 18:06:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-11-13 18:06:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1181. [2021-11-13 18:06:49,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 771 states have (on average 1.787289234760052) internal successors, (1378), 1144 states have internal predecessors, (1378), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2021-11-13 18:06:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1426 transitions. [2021-11-13 18:06:49,991 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1426 transitions. Word has length 88 [2021-11-13 18:06:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:49,991 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1426 transitions. [2021-11-13 18:06:49,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 7.0) internal successors, (91), 12 states have internal predecessors, (91), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 18:06:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1426 transitions. [2021-11-13 18:06:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 18:06:49,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:49,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:50,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-13 18:06:50,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:50,210 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:06:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:50,211 INFO L85 PathProgramCache]: Analyzing trace with hash -68595797, now seen corresponding path program 1 times [2021-11-13 18:06:50,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:50,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16744757] [2021-11-13 18:06:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:50,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:50,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:50,212 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:50,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 18:06:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:06:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:50,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:50,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:50,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16744757] [2021-11-13 18:06:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16744757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:50,968 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:50,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-13 18:06:50,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249353977] [2021-11-13 18:06:50,968 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:50,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:06:50,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:06:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:06:50,969 INFO L87 Difference]: Start difference. First operand 1181 states and 1426 transitions. Second operand has 9 states, 7 states have (on average 13.0) internal successors, (91), 9 states have internal predecessors, (91), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:51,094 INFO L93 Difference]: Finished difference Result 1190 states and 1436 transitions. [2021-11-13 18:06:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:06:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.0) internal successors, (91), 9 states have internal predecessors, (91), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 99 [2021-11-13 18:06:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:51,098 INFO L225 Difference]: With dead ends: 1190 [2021-11-13 18:06:51,098 INFO L226 Difference]: Without dead ends: 1187 [2021-11-13 18:06:51,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:06:51,099 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 13 mSDsluCounter, 2826 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3772 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.45ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:51,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3772 Invalid, 50 Unknown, 0 Unchecked, 2.45ms Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 82.19ms Time] [2021-11-13 18:06:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-11-13 18:06:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1187. [2021-11-13 18:06:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 775 states have (on average 1.784516129032258) internal successors, (1383), 1149 states have internal predecessors, (1383), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:06:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1433 transitions. [2021-11-13 18:06:51,123 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1433 transitions. Word has length 99 [2021-11-13 18:06:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:51,124 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1433 transitions. [2021-11-13 18:06:51,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 13.0) internal successors, (91), 9 states have internal predecessors, (91), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1433 transitions. [2021-11-13 18:06:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:06:51,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:51,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:51,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:51,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:51,341 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:06:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash -442423661, now seen corresponding path program 1 times [2021-11-13 18:06:51,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:51,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108470137] [2021-11-13 18:06:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:51,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:51,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:51,347 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:51,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 18:06:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:06:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:51,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:52,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:52,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108470137] [2021-11-13 18:06:52,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108470137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:52,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:06:52,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-13 18:06:52,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972115848] [2021-11-13 18:06:52,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:52,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:06:52,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:06:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:06:52,189 INFO L87 Difference]: Start difference. First operand 1187 states and 1433 transitions. Second operand has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 11 states have internal predecessors, (93), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:52,418 INFO L93 Difference]: Finished difference Result 1196 states and 1443 transitions. [2021-11-13 18:06:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:06:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 11 states have internal predecessors, (93), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 100 [2021-11-13 18:06:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:52,421 INFO L225 Difference]: With dead ends: 1196 [2021-11-13 18:06:52,421 INFO L226 Difference]: Without dead ends: 1193 [2021-11-13 18:06:52,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:06:52,422 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 20 mSDsluCounter, 5654 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6601 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.99ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:52,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 6601 Invalid, 105 Unknown, 0 Unchecked, 3.99ms Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 158.05ms Time] [2021-11-13 18:06:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-11-13 18:06:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1188. [2021-11-13 18:06:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 776 states have (on average 1.7847938144329898) internal successors, (1385), 1150 states have internal predecessors, (1385), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:06:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1435 transitions. [2021-11-13 18:06:52,442 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1435 transitions. Word has length 100 [2021-11-13 18:06:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:52,442 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 1435 transitions. [2021-11-13 18:06:52,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 11 states have internal predecessors, (93), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1435 transitions. [2021-11-13 18:06:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 18:06:52,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:52,448 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:52,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:52,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:52,667 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:06:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 853814443, now seen corresponding path program 2 times [2021-11-13 18:06:52,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:52,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841635915] [2021-11-13 18:06:52,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:06:52,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:52,669 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:52,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 18:06:53,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:06:53,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:06:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:06:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:53,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:53,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:53,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841635915] [2021-11-13 18:06:53,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841635915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:53,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:06:53,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-13 18:06:53,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813134608] [2021-11-13 18:06:53,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:53,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:06:53,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:53,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:06:53,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:06:53,777 INFO L87 Difference]: Start difference. First operand 1188 states and 1435 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:54,024 INFO L93 Difference]: Finished difference Result 1199 states and 1447 transitions. [2021-11-13 18:06:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:06:54,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 101 [2021-11-13 18:06:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:54,027 INFO L225 Difference]: With dead ends: 1199 [2021-11-13 18:06:54,027 INFO L226 Difference]: Without dead ends: 1196 [2021-11-13 18:06:54,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:06:54,028 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 36 mSDsluCounter, 4722 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 5670 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:54,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 5670 Invalid, 121 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [21 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 166.57ms Time] [2021-11-13 18:06:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-11-13 18:06:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1189. [2021-11-13 18:06:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 777 states have (on average 1.785070785070785) internal successors, (1387), 1151 states have internal predecessors, (1387), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:06:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1437 transitions. [2021-11-13 18:06:54,046 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1437 transitions. Word has length 101 [2021-11-13 18:06:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:54,046 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1437 transitions. [2021-11-13 18:06:54,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1437 transitions. [2021-11-13 18:06:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 18:06:54,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:54,048 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:54,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:54,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:54,267 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:06:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1912477293, now seen corresponding path program 3 times [2021-11-13 18:06:54,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:54,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646351671] [2021-11-13 18:06:54,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:06:54,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:54,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:54,269 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:54,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 18:06:54,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:06:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:06:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:06:54,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:55,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:55,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:55,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646351671] [2021-11-13 18:06:55,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646351671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:55,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:06:55,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-13 18:06:55,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992944798] [2021-11-13 18:06:55,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:55,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:06:55,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:55,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:06:55,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:06:55,630 INFO L87 Difference]: Start difference. First operand 1189 states and 1437 transitions. Second operand has 15 states, 13 states have (on average 7.461538461538462) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:56,266 INFO L93 Difference]: Finished difference Result 1202 states and 1450 transitions. [2021-11-13 18:06:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:06:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 7.461538461538462) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 102 [2021-11-13 18:06:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:56,269 INFO L225 Difference]: With dead ends: 1202 [2021-11-13 18:06:56,269 INFO L226 Difference]: Without dead ends: 1194 [2021-11-13 18:06:56,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:06:56,270 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 33 mSDsluCounter, 8499 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 322.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 9448 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.04ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 366.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:56,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 9448 Invalid, 204 Unknown, 0 Unchecked, 6.04ms Time], IncrementalHoareTripleChecker [26 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 366.72ms Time] [2021-11-13 18:06:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-13 18:06:56,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1190. [2021-11-13 18:06:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 778 states have (on average 1.7840616966580978) internal successors, (1388), 1152 states have internal predecessors, (1388), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:06:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1438 transitions. [2021-11-13 18:06:56,287 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1438 transitions. Word has length 102 [2021-11-13 18:06:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:56,288 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 1438 transitions. [2021-11-13 18:06:56,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 7.461538461538462) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1438 transitions. [2021-11-13 18:06:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:06:56,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:56,290 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:56,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-13 18:06:56,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:56,506 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:06:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1768175189, now seen corresponding path program 4 times [2021-11-13 18:06:56,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:56,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107474687] [2021-11-13 18:06:56,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:06:56,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:56,509 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:56,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 18:06:56,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:06:56,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:06:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:06:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:57,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:57,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:57,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107474687] [2021-11-13 18:06:57,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107474687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:57,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:06:57,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-13 18:06:57,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096990644] [2021-11-13 18:06:57,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:57,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:06:57,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:06:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:06:57,830 INFO L87 Difference]: Start difference. First operand 1190 states and 1438 transitions. Second operand has 17 states, 15 states have (on average 6.6) internal successors, (99), 17 states have internal predecessors, (99), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:58,282 INFO L93 Difference]: Finished difference Result 1203 states and 1452 transitions. [2021-11-13 18:06:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:06:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 6.6) internal successors, (99), 17 states have internal predecessors, (99), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 103 [2021-11-13 18:06:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:58,285 INFO L225 Difference]: With dead ends: 1203 [2021-11-13 18:06:58,286 INFO L226 Difference]: Without dead ends: 1200 [2021-11-13 18:06:58,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:06:58,287 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 50 mSDsluCounter, 7562 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 282.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8511 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 328.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:58,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 8511 Invalid, 207 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [29 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 328.26ms Time] [2021-11-13 18:06:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-11-13 18:06:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1191. [2021-11-13 18:06:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 779 states have (on average 1.784338896020539) internal successors, (1390), 1153 states have internal predecessors, (1390), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:06:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1440 transitions. [2021-11-13 18:06:58,306 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1440 transitions. Word has length 103 [2021-11-13 18:06:58,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:58,306 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1440 transitions. [2021-11-13 18:06:58,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 6.6) internal successors, (99), 17 states have internal predecessors, (99), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:06:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1440 transitions. [2021-11-13 18:06:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:06:58,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:58,308 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:58,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-13 18:06:58,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:58,527 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:06:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1589777261, now seen corresponding path program 5 times [2021-11-13 18:06:58,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:58,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959049142] [2021-11-13 18:06:58,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:06:58,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:58,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:58,529 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:58,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 18:06:58,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-13 18:06:58,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:06:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:06:58,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:59,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:06:59,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:59,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959049142] [2021-11-13 18:06:59,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959049142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:06:59,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:06:59,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-13 18:06:59,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93342607] [2021-11-13 18:06:59,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:59,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:06:59,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:59,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:06:59,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:06:59,981 INFO L87 Difference]: Start difference. First operand 1191 states and 1440 transitions. Second operand has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 19 states have internal predecessors, (101), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:01,157 INFO L93 Difference]: Finished difference Result 1206 states and 1455 transitions. [2021-11-13 18:07:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:07:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 19 states have internal predecessors, (101), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 104 [2021-11-13 18:07:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:01,159 INFO L225 Difference]: With dead ends: 1206 [2021-11-13 18:07:01,159 INFO L226 Difference]: Without dead ends: 1198 [2021-11-13 18:07:01,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:07:01,160 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 47 mSDsluCounter, 13234 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 530.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 14184 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.98ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 612.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:01,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 14184 Invalid, 378 Unknown, 0 Unchecked, 8.98ms Time], IncrementalHoareTripleChecker [47 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 612.49ms Time] [2021-11-13 18:07:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-13 18:07:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1192. [2021-11-13 18:07:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 780 states have (on average 1.7833333333333334) internal successors, (1391), 1154 states have internal predecessors, (1391), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1441 transitions. [2021-11-13 18:07:01,176 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1441 transitions. Word has length 104 [2021-11-13 18:07:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:01,177 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1441 transitions. [2021-11-13 18:07:01,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 19 states have internal predecessors, (101), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1441 transitions. [2021-11-13 18:07:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 18:07:01,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:01,179 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:01,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 18:07:01,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:01,394 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash -354408789, now seen corresponding path program 6 times [2021-11-13 18:07:01,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:01,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946654247] [2021-11-13 18:07:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:07:01,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:01,396 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:01,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 18:07:02,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-13 18:07:02,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:02,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:07:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:02,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:03,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:03,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946654247] [2021-11-13 18:07:03,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946654247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:03,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:03,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-13 18:07:03,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276177523] [2021-11-13 18:07:03,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:03,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:07:03,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:03,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:07:03,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:07:03,313 INFO L87 Difference]: Start difference. First operand 1192 states and 1441 transitions. Second operand has 21 states, 19 states have (on average 5.421052631578948) internal successors, (103), 21 states have internal predecessors, (103), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:04,700 INFO L93 Difference]: Finished difference Result 1207 states and 1456 transitions. [2021-11-13 18:07:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:07:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.421052631578948) internal successors, (103), 21 states have internal predecessors, (103), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 105 [2021-11-13 18:07:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:04,703 INFO L225 Difference]: With dead ends: 1207 [2021-11-13 18:07:04,703 INFO L226 Difference]: Without dead ends: 1199 [2021-11-13 18:07:04,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:07:04,704 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 52 mSDsluCounter, 11347 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 573.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 12297 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.59ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 671.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:04,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 12297 Invalid, 354 Unknown, 0 Unchecked, 11.59ms Time], IncrementalHoareTripleChecker [44 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 671.02ms Time] [2021-11-13 18:07:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-11-13 18:07:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1193. [2021-11-13 18:07:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 781 states have (on average 1.7823303457106274) internal successors, (1392), 1155 states have internal predecessors, (1392), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1442 transitions. [2021-11-13 18:07:04,722 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1442 transitions. Word has length 105 [2021-11-13 18:07:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:04,723 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 1442 transitions. [2021-11-13 18:07:04,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.421052631578948) internal successors, (103), 21 states have internal predecessors, (103), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1442 transitions. [2021-11-13 18:07:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 18:07:04,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:04,725 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:04,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 18:07:04,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:04,942 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash -712691821, now seen corresponding path program 7 times [2021-11-13 18:07:04,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:04,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721513086] [2021-11-13 18:07:04,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:07:04,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:04,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:04,945 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:04,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 18:07:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:05,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:07:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:05,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:06,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:06,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721513086] [2021-11-13 18:07:06,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721513086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:06,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:06,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-13 18:07:06,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209692065] [2021-11-13 18:07:06,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:06,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:07:06,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:07:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:07:06,540 INFO L87 Difference]: Start difference. First operand 1193 states and 1442 transitions. Second operand has 23 states, 21 states have (on average 5.0) internal successors, (105), 23 states have internal predecessors, (105), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:07,387 INFO L93 Difference]: Finished difference Result 1208 states and 1458 transitions. [2021-11-13 18:07:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:07:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 5.0) internal successors, (105), 23 states have internal predecessors, (105), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 106 [2021-11-13 18:07:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:07,390 INFO L225 Difference]: With dead ends: 1208 [2021-11-13 18:07:07,390 INFO L226 Difference]: Without dead ends: 1205 [2021-11-13 18:07:07,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:07:07,391 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 65 mSDsluCounter, 14181 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 566.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 15131 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.30ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 659.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:07,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 15131 Invalid, 409 Unknown, 0 Unchecked, 10.30ms Time], IncrementalHoareTripleChecker [31 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 659.20ms Time] [2021-11-13 18:07:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-11-13 18:07:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1194. [2021-11-13 18:07:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 782 states have (on average 1.7826086956521738) internal successors, (1394), 1156 states have internal predecessors, (1394), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1444 transitions. [2021-11-13 18:07:07,403 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1444 transitions. Word has length 106 [2021-11-13 18:07:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:07,404 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1444 transitions. [2021-11-13 18:07:07,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 5.0) internal successors, (105), 23 states have internal predecessors, (105), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1444 transitions. [2021-11-13 18:07:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 18:07:07,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:07,405 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:07,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-13 18:07:07,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:07,621 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1065436075, now seen corresponding path program 8 times [2021-11-13 18:07:07,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:07,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956466883] [2021-11-13 18:07:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:07:07,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:07,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:07,624 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:07,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 18:07:08,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:07:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:07:08,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:08,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:10,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:10,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956466883] [2021-11-13 18:07:10,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956466883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:10,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:10,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-13 18:07:10,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716706892] [2021-11-13 18:07:10,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:10,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:07:10,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:07:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:07:10,430 INFO L87 Difference]: Start difference. First operand 1194 states and 1444 transitions. Second operand has 25 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 25 states have internal predecessors, (107), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:13,317 INFO L93 Difference]: Finished difference Result 1211 states and 1462 transitions. [2021-11-13 18:07:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 18:07:13,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 25 states have internal predecessors, (107), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 107 [2021-11-13 18:07:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:13,321 INFO L225 Difference]: With dead ends: 1211 [2021-11-13 18:07:13,321 INFO L226 Difference]: Without dead ends: 1208 [2021-11-13 18:07:13,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:07:13,322 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 68 mSDsluCounter, 17977 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1022.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 18928 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.14ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1187.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:13,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 18928 Invalid, 609 Unknown, 0 Unchecked, 12.14ms Time], IncrementalHoareTripleChecker [61 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 1187.11ms Time] [2021-11-13 18:07:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-11-13 18:07:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1195. [2021-11-13 18:07:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 783 states have (on average 1.7828863346104726) internal successors, (1396), 1157 states have internal predecessors, (1396), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1446 transitions. [2021-11-13 18:07:13,338 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1446 transitions. Word has length 107 [2021-11-13 18:07:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:13,339 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1446 transitions. [2021-11-13 18:07:13,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 25 states have internal predecessors, (107), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1446 transitions. [2021-11-13 18:07:13,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 18:07:13,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:13,341 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:13,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 18:07:13,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:13,556 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash 352826003, now seen corresponding path program 9 times [2021-11-13 18:07:13,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:13,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137442301] [2021-11-13 18:07:13,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:07:13,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:13,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:13,558 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:13,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 18:07:14,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 18:07:14,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:14,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:07:14,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:14,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:16,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:16,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137442301] [2021-11-13 18:07:16,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137442301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:16,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:16,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-11-13 18:07:16,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591072318] [2021-11-13 18:07:16,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:16,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:07:16,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:07:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:07:16,074 INFO L87 Difference]: Start difference. First operand 1195 states and 1446 transitions. Second operand has 27 states, 25 states have (on average 4.36) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:18,580 INFO L93 Difference]: Finished difference Result 1214 states and 1465 transitions. [2021-11-13 18:07:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 18:07:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.36) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 108 [2021-11-13 18:07:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:18,585 INFO L225 Difference]: With dead ends: 1214 [2021-11-13 18:07:18,585 INFO L226 Difference]: Without dead ends: 1206 [2021-11-13 18:07:18,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:07:18,586 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 93 mSDsluCounter, 15155 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 896.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 16107 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.26ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1034.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:18,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 16107 Invalid, 588 Unknown, 0 Unchecked, 10.26ms Time], IncrementalHoareTripleChecker [79 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1034.53ms Time] [2021-11-13 18:07:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-11-13 18:07:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1196. [2021-11-13 18:07:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 784 states have (on average 1.781887755102041) internal successors, (1397), 1158 states have internal predecessors, (1397), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1447 transitions. [2021-11-13 18:07:18,604 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1447 transitions. Word has length 108 [2021-11-13 18:07:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:18,604 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1447 transitions. [2021-11-13 18:07:18,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.36) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1447 transitions. [2021-11-13 18:07:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 18:07:18,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:18,606 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:18,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-13 18:07:18,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:18,823 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -263249749, now seen corresponding path program 10 times [2021-11-13 18:07:18,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:18,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270063845] [2021-11-13 18:07:18,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:07:18,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:18,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:18,826 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:18,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-13 18:07:19,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:07:19,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:19,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:07:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:19,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:20,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:20,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270063845] [2021-11-13 18:07:20,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270063845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:20,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:20,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-11-13 18:07:20,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288828612] [2021-11-13 18:07:20,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:20,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 18:07:20,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 18:07:20,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:07:20,812 INFO L87 Difference]: Start difference. First operand 1196 states and 1447 transitions. Second operand has 29 states, 27 states have (on average 4.111111111111111) internal successors, (111), 29 states have internal predecessors, (111), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:21,846 INFO L93 Difference]: Finished difference Result 1215 states and 1467 transitions. [2021-11-13 18:07:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 18:07:21,847 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 4.111111111111111) internal successors, (111), 29 states have internal predecessors, (111), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 109 [2021-11-13 18:07:21,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:21,849 INFO L225 Difference]: With dead ends: 1215 [2021-11-13 18:07:21,850 INFO L226 Difference]: Without dead ends: 1212 [2021-11-13 18:07:21,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:07:21,851 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 89 mSDsluCounter, 13272 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 691.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 14224 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.10ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 803.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:21,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 14224 Invalid, 554 Unknown, 0 Unchecked, 10.10ms Time], IncrementalHoareTripleChecker [56 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 803.31ms Time] [2021-11-13 18:07:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-11-13 18:07:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1197. [2021-11-13 18:07:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 785 states have (on average 1.7821656050955414) internal successors, (1399), 1159 states have internal predecessors, (1399), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1449 transitions. [2021-11-13 18:07:21,866 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1449 transitions. Word has length 109 [2021-11-13 18:07:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:21,867 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1449 transitions. [2021-11-13 18:07:21,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 4.111111111111111) internal successors, (111), 29 states have internal predecessors, (111), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1449 transitions. [2021-11-13 18:07:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 18:07:21,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:21,868 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:21,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-13 18:07:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:22,104 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2113238419, now seen corresponding path program 11 times [2021-11-13 18:07:22,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:22,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644207224] [2021-11-13 18:07:22,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:07:22,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:22,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:22,107 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:22,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 18:07:22,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-13 18:07:22,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:22,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:07:22,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:22,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:24,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:24,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644207224] [2021-11-13 18:07:24,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644207224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:24,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:24,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-11-13 18:07:24,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361787978] [2021-11-13 18:07:24,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:24,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:07:24,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:24,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:07:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:07:24,596 INFO L87 Difference]: Start difference. First operand 1197 states and 1449 transitions. Second operand has 31 states, 29 states have (on average 3.896551724137931) internal successors, (113), 31 states have internal predecessors, (113), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:28,396 INFO L93 Difference]: Finished difference Result 1218 states and 1470 transitions. [2021-11-13 18:07:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:07:28,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.896551724137931) internal successors, (113), 31 states have internal predecessors, (113), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 110 [2021-11-13 18:07:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:28,399 INFO L225 Difference]: With dead ends: 1218 [2021-11-13 18:07:28,399 INFO L226 Difference]: Without dead ends: 1210 [2021-11-13 18:07:28,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:07:28,400 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 119 mSDsluCounter, 19895 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1295.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 20848 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.51ms SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1488.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:28,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 20848 Invalid, 845 Unknown, 0 Unchecked, 14.51ms Time], IncrementalHoareTripleChecker [116 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1488.90ms Time] [2021-11-13 18:07:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-13 18:07:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1198. [2021-11-13 18:07:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 786 states have (on average 1.7811704834605597) internal successors, (1400), 1160 states have internal predecessors, (1400), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1450 transitions. [2021-11-13 18:07:28,418 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1450 transitions. Word has length 110 [2021-11-13 18:07:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:28,418 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1450 transitions. [2021-11-13 18:07:28,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.896551724137931) internal successors, (113), 31 states have internal predecessors, (113), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1450 transitions. [2021-11-13 18:07:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:07:28,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:28,420 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:28,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-13 18:07:28,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:28,635 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1525039701, now seen corresponding path program 12 times [2021-11-13 18:07:28,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:28,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193978108] [2021-11-13 18:07:28,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:07:28,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:28,637 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:28,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-13 18:07:29,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-13 18:07:29,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:07:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:29,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:31,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:31,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193978108] [2021-11-13 18:07:31,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193978108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:31,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:31,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-11-13 18:07:31,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272680289] [2021-11-13 18:07:31,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:31,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 18:07:31,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 18:07:31,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:07:31,717 INFO L87 Difference]: Start difference. First operand 1198 states and 1450 transitions. Second operand has 33 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 33 states have internal predecessors, (115), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:36,220 INFO L93 Difference]: Finished difference Result 1219 states and 1471 transitions. [2021-11-13 18:07:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:07:36,221 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 33 states have internal predecessors, (115), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 111 [2021-11-13 18:07:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:36,223 INFO L225 Difference]: With dead ends: 1219 [2021-11-13 18:07:36,223 INFO L226 Difference]: Without dead ends: 1211 [2021-11-13 18:07:36,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:07:36,224 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 123 mSDsluCounter, 22744 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1532.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 23697 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.35ms SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1765.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:36,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 23697 Invalid, 971 Unknown, 0 Unchecked, 15.35ms Time], IncrementalHoareTripleChecker [114 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 1765.20ms Time] [2021-11-13 18:07:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-11-13 18:07:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1199. [2021-11-13 18:07:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 787 states have (on average 1.7801778907242694) internal successors, (1401), 1161 states have internal predecessors, (1401), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1451 transitions. [2021-11-13 18:07:36,236 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1451 transitions. Word has length 111 [2021-11-13 18:07:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:36,236 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 1451 transitions. [2021-11-13 18:07:36,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 33 states have internal predecessors, (115), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1451 transitions. [2021-11-13 18:07:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:07:36,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:36,238 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:36,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-13 18:07:36,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:36,454 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1652455571, now seen corresponding path program 13 times [2021-11-13 18:07:36,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:36,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612215976] [2021-11-13 18:07:36,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:07:36,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:36,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:36,457 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:36,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-13 18:07:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:07:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:37,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:39,054 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:39,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612215976] [2021-11-13 18:07:39,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612215976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:39,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:39,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-11-13 18:07:39,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830680463] [2021-11-13 18:07:39,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:39,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:07:39,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:39,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:07:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:07:39,056 INFO L87 Difference]: Start difference. First operand 1199 states and 1451 transitions. Second operand has 35 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 35 states have internal predecessors, (117), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:40,563 INFO L93 Difference]: Finished difference Result 1220 states and 1473 transitions. [2021-11-13 18:07:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:07:40,564 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 35 states have internal predecessors, (117), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 112 [2021-11-13 18:07:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:40,565 INFO L225 Difference]: With dead ends: 1220 [2021-11-13 18:07:40,566 INFO L226 Difference]: Without dead ends: 1217 [2021-11-13 18:07:40,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:07:40,567 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 140 mSDsluCounter, 14246 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1009.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 15199 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.38ms SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1184.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:40,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 15199 Invalid, 732 Unknown, 0 Unchecked, 11.38ms Time], IncrementalHoareTripleChecker [84 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1184.11ms Time] [2021-11-13 18:07:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-11-13 18:07:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1200. [2021-11-13 18:07:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 788 states have (on average 1.7804568527918783) internal successors, (1403), 1162 states have internal predecessors, (1403), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1453 transitions. [2021-11-13 18:07:40,579 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1453 transitions. Word has length 112 [2021-11-13 18:07:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:40,579 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1453 transitions. [2021-11-13 18:07:40,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 35 states have internal predecessors, (117), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1453 transitions. [2021-11-13 18:07:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 18:07:40,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:40,581 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:40,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-13 18:07:40,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:40,810 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:40,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:40,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1370561195, now seen corresponding path program 14 times [2021-11-13 18:07:40,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:40,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443339612] [2021-11-13 18:07:40,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:07:40,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:40,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:40,812 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:40,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-13 18:07:41,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:07:41,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:41,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:07:41,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:42,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:45,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:45,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443339612] [2021-11-13 18:07:45,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443339612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:45,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:45,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-11-13 18:07:45,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638757357] [2021-11-13 18:07:45,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:45,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:07:45,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:07:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:07:45,631 INFO L87 Difference]: Start difference. First operand 1200 states and 1453 transitions. Second operand has 37 states, 35 states have (on average 3.4) internal successors, (119), 37 states have internal predecessors, (119), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:52,091 INFO L93 Difference]: Finished difference Result 1223 states and 1476 transitions. [2021-11-13 18:07:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:07:52,092 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 3.4) internal successors, (119), 37 states have internal predecessors, (119), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 113 [2021-11-13 18:07:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:52,095 INFO L225 Difference]: With dead ends: 1223 [2021-11-13 18:07:52,095 INFO L226 Difference]: Without dead ends: 1215 [2021-11-13 18:07:52,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=292, Invalid=2060, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:07:52,097 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 163 mSDsluCounter, 24633 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2011.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 25587 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.30ms SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2383.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:52,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 25587 Invalid, 1167 Unknown, 0 Unchecked, 18.30ms Time], IncrementalHoareTripleChecker [149 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 2383.17ms Time] [2021-11-13 18:07:52,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-11-13 18:07:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1201. [2021-11-13 18:07:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 789 states have (on average 1.779467680608365) internal successors, (1404), 1163 states have internal predecessors, (1404), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:07:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1454 transitions. [2021-11-13 18:07:52,116 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1454 transitions. Word has length 113 [2021-11-13 18:07:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:52,116 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 1454 transitions. [2021-11-13 18:07:52,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 3.4) internal successors, (119), 37 states have internal predecessors, (119), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:07:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1454 transitions. [2021-11-13 18:07:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 18:07:52,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:52,118 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:07:52,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-13 18:07:52,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:07:52,336 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:07:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1221770131, now seen corresponding path program 15 times [2021-11-13 18:07:52,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:07:52,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188593414] [2021-11-13 18:07:52,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:07:52,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:07:52,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:07:52,339 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:07:52,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-13 18:07:53,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 18:07:53,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:07:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:07:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:53,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:07:56,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:07:56,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188593414] [2021-11-13 18:07:56,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188593414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:56,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:56,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-11-13 18:07:56,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988456167] [2021-11-13 18:07:56,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:07:56,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:07:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:07:56,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:07:56,346 INFO L87 Difference]: Start difference. First operand 1201 states and 1454 transitions. Second operand has 39 states, 37 states have (on average 3.27027027027027) internal successors, (121), 39 states have internal predecessors, (121), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:02,969 INFO L93 Difference]: Finished difference Result 1224 states and 1477 transitions. [2021-11-13 18:08:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 18:08:02,970 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.27027027027027) internal successors, (121), 39 states have internal predecessors, (121), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 114 [2021-11-13 18:08:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:02,972 INFO L225 Difference]: With dead ends: 1224 [2021-11-13 18:08:02,972 INFO L226 Difference]: Without dead ends: 1216 [2021-11-13 18:08:02,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=287, Invalid=2163, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:08:02,973 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 165 mSDsluCounter, 25611 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2028.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 26565 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.24ms SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2374.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:02,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 26565 Invalid, 1243 Unknown, 0 Unchecked, 18.24ms Time], IncrementalHoareTripleChecker [151 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 2374.76ms Time] [2021-11-13 18:08:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-13 18:08:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1202. [2021-11-13 18:08:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 790 states have (on average 1.7784810126582278) internal successors, (1405), 1164 states have internal predecessors, (1405), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:08:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1455 transitions. [2021-11-13 18:08:02,989 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1455 transitions. Word has length 114 [2021-11-13 18:08:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:02,990 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 1455 transitions. [2021-11-13 18:08:02,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.27027027027027) internal successors, (121), 39 states have internal predecessors, (121), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1455 transitions. [2021-11-13 18:08:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 18:08:02,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:02,992 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:03,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-13 18:08:03,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:08:03,209 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:08:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:03,209 INFO L85 PathProgramCache]: Analyzing trace with hash 904214443, now seen corresponding path program 16 times [2021-11-13 18:08:03,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:08:03,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868061633] [2021-11-13 18:08:03,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:08:03,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:08:03,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:08:03,212 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:08:03,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-13 18:08:03,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:08:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:08:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:08:03,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:04,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:06,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:08:06,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868061633] [2021-11-13 18:08:06,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868061633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:08:06,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:08:06,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-11-13 18:08:06,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149815937] [2021-11-13 18:08:06,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:08:06,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:08:06,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:08:06,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:08:06,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:08:06,692 INFO L87 Difference]: Start difference. First operand 1202 states and 1455 transitions. Second operand has 41 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 41 states have internal predecessors, (123), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:08,656 INFO L93 Difference]: Finished difference Result 1225 states and 1479 transitions. [2021-11-13 18:08:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 18:08:08,657 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 41 states have internal predecessors, (123), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2021-11-13 18:08:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:08,658 INFO L225 Difference]: With dead ends: 1225 [2021-11-13 18:08:08,658 INFO L226 Difference]: Without dead ends: 1222 [2021-11-13 18:08:08,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=454, Invalid=2198, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:08:08,659 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 210 mSDsluCounter, 20887 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1363.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 21841 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.68ms SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1594.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:08,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 21841 Invalid, 1032 Unknown, 0 Unchecked, 15.68ms Time], IncrementalHoareTripleChecker [105 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 1594.25ms Time] [2021-11-13 18:08:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-11-13 18:08:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1203. [2021-11-13 18:08:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 791 states have (on average 1.7787610619469028) internal successors, (1407), 1165 states have internal predecessors, (1407), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:08:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1457 transitions. [2021-11-13 18:08:08,673 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1457 transitions. Word has length 115 [2021-11-13 18:08:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:08,673 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1457 transitions. [2021-11-13 18:08:08,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 41 states have internal predecessors, (123), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1457 transitions. [2021-11-13 18:08:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:08:08,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:08,674 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:08,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:08,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:08:08,875 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:08:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash -350077293, now seen corresponding path program 17 times [2021-11-13 18:08:08,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:08:08,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719314816] [2021-11-13 18:08:08,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:08:08,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:08:08,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:08:08,877 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:08:08,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-13 18:08:09,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-13 18:08:09,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:08:09,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:08:09,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:09,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:13,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:08:13,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719314816] [2021-11-13 18:08:13,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719314816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:08:13,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:08:13,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-11-13 18:08:13,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994181409] [2021-11-13 18:08:13,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:08:13,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-13 18:08:13,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:08:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-13 18:08:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:08:13,007 INFO L87 Difference]: Start difference. First operand 1203 states and 1457 transitions. Second operand has 43 states, 41 states have (on average 3.048780487804878) internal successors, (125), 43 states have internal predecessors, (125), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:22,052 INFO L93 Difference]: Finished difference Result 1228 states and 1482 transitions. [2021-11-13 18:08:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:08:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.048780487804878) internal successors, (125), 43 states have internal predecessors, (125), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 116 [2021-11-13 18:08:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:22,054 INFO L225 Difference]: With dead ends: 1228 [2021-11-13 18:08:22,055 INFO L226 Difference]: Without dead ends: 1220 [2021-11-13 18:08:22,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=337, Invalid=2633, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:08:22,057 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 209 mSDsluCounter, 25644 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2556.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 26599 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.58ms SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2954.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:22,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 26599 Invalid, 1440 Unknown, 0 Unchecked, 19.58ms Time], IncrementalHoareTripleChecker [202 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 2954.11ms Time] [2021-11-13 18:08:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-11-13 18:08:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1204. [2021-11-13 18:08:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 792 states have (on average 1.7777777777777777) internal successors, (1408), 1166 states have internal predecessors, (1408), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:08:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1458 transitions. [2021-11-13 18:08:22,071 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1458 transitions. Word has length 116 [2021-11-13 18:08:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:22,071 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1458 transitions. [2021-11-13 18:08:22,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 3.048780487804878) internal successors, (125), 43 states have internal predecessors, (125), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1458 transitions. [2021-11-13 18:08:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 18:08:22,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:22,072 INFO L514 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:22,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:22,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:08:22,288 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:08:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:22,288 INFO L85 PathProgramCache]: Analyzing trace with hash -578415445, now seen corresponding path program 18 times [2021-11-13 18:08:22,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:08:22,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017678678] [2021-11-13 18:08:22,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:08:22,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:08:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:08:22,290 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:08:22,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-13 18:08:23,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-13 18:08:23,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:08:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 18:08:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:23,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:27,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:08:27,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017678678] [2021-11-13 18:08:27,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017678678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:08:27,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:08:27,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2021-11-13 18:08:27,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569310318] [2021-11-13 18:08:27,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:08:27,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-13 18:08:27,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:08:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-13 18:08:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:08:27,172 INFO L87 Difference]: Start difference. First operand 1204 states and 1458 transitions. Second operand has 45 states, 43 states have (on average 2.953488372093023) internal successors, (127), 45 states have internal predecessors, (127), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:36,215 INFO L93 Difference]: Finished difference Result 1229 states and 1483 transitions. [2021-11-13 18:08:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:08:36,216 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.953488372093023) internal successors, (127), 45 states have internal predecessors, (127), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 117 [2021-11-13 18:08:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:36,218 INFO L225 Difference]: With dead ends: 1229 [2021-11-13 18:08:36,218 INFO L226 Difference]: Without dead ends: 1221 [2021-11-13 18:08:36,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=353, Invalid=2839, Unknown=0, NotChecked=0, Total=3192 [2021-11-13 18:08:36,220 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 215 mSDsluCounter, 28471 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2531.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 29426 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.34ms SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2951.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:36,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 29426 Invalid, 1578 Unknown, 0 Unchecked, 20.34ms Time], IncrementalHoareTripleChecker [212 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 2951.84ms Time] [2021-11-13 18:08:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-13 18:08:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1205. [2021-11-13 18:08:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 793 states have (on average 1.776796973518285) internal successors, (1409), 1167 states have internal predecessors, (1409), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:08:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1459 transitions. [2021-11-13 18:08:36,235 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1459 transitions. Word has length 117 [2021-11-13 18:08:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:36,236 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 1459 transitions. [2021-11-13 18:08:36,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.953488372093023) internal successors, (127), 45 states have internal predecessors, (127), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1459 transitions. [2021-11-13 18:08:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 18:08:36,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:36,238 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:36,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-13 18:08:36,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:08:36,451 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:08:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash 933036435, now seen corresponding path program 19 times [2021-11-13 18:08:36,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:08:36,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339573055] [2021-11-13 18:08:36,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:08:36,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:08:36,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:08:36,453 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:08:36,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-13 18:08:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:36,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 18:08:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:37,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:40,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:08:40,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339573055] [2021-11-13 18:08:40,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339573055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:08:40,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:08:40,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-11-13 18:08:40,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193831180] [2021-11-13 18:08:40,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:08:40,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 18:08:40,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:08:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 18:08:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1837, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:08:40,189 INFO L87 Difference]: Start difference. First operand 1205 states and 1459 transitions. Second operand has 47 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 47 states have internal predecessors, (129), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:42,534 INFO L93 Difference]: Finished difference Result 1230 states and 1485 transitions. [2021-11-13 18:08:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:08:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 47 states have internal predecessors, (129), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 118 [2021-11-13 18:08:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:42,542 INFO L225 Difference]: With dead ends: 1230 [2021-11-13 18:08:42,542 INFO L226 Difference]: Without dead ends: 1227 [2021-11-13 18:08:42,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=577, Invalid=2845, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:08:42,543 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 249 mSDsluCounter, 23764 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1652.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 24719 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.08ms SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1927.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:42,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 24719 Invalid, 1311 Unknown, 0 Unchecked, 18.08ms Time], IncrementalHoareTripleChecker [126 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1927.25ms Time] [2021-11-13 18:08:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-11-13 18:08:42,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1206. [2021-11-13 18:08:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 794 states have (on average 1.7770780856423174) internal successors, (1411), 1168 states have internal predecessors, (1411), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:08:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1461 transitions. [2021-11-13 18:08:42,556 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1461 transitions. Word has length 118 [2021-11-13 18:08:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:42,557 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 1461 transitions. [2021-11-13 18:08:42,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 47 states have internal predecessors, (129), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:08:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1461 transitions. [2021-11-13 18:08:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 18:08:42,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:42,558 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:42,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:08:42,758 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:08:42,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:42,760 INFO L85 PathProgramCache]: Analyzing trace with hash 543404459, now seen corresponding path program 20 times [2021-11-13 18:08:42,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:08:42,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123998793] [2021-11-13 18:08:42,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:08:42,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:08:42,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:08:42,762 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:08:42,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-13 18:08:43,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:08:43,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:08:43,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 18:08:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:44,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:50,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:08:50,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123998793] [2021-11-13 18:08:50,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123998793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:08:50,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:08:50,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2021-11-13 18:08:50,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972514643] [2021-11-13 18:08:50,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:08:50,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 18:08:50,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:08:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 18:08:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:08:50,206 INFO L87 Difference]: Start difference. First operand 1206 states and 1461 transitions. Second operand has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 49 states have internal predecessors, (131), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:09:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:02,588 INFO L93 Difference]: Finished difference Result 1233 states and 1488 transitions. [2021-11-13 18:09:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 18:09:02,588 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 49 states have internal predecessors, (131), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 119 [2021-11-13 18:09:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:02,590 INFO L225 Difference]: With dead ends: 1233 [2021-11-13 18:09:02,590 INFO L226 Difference]: Without dead ends: 1225 [2021-11-13 18:09:02,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=436, Invalid=3470, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 18:09:02,592 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 265 mSDsluCounter, 34145 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3674.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 35101 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.72ms SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4307.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:02,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 35101 Invalid, 1997 Unknown, 0 Unchecked, 25.72ms Time], IncrementalHoareTripleChecker [253 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 4307.76ms Time] [2021-11-13 18:09:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-11-13 18:09:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1207. [2021-11-13 18:09:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 795 states have (on average 1.7761006289308177) internal successors, (1412), 1169 states have internal predecessors, (1412), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:09:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1462 transitions. [2021-11-13 18:09:02,604 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1462 transitions. Word has length 119 [2021-11-13 18:09:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:02,605 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 1462 transitions. [2021-11-13 18:09:02,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 49 states have internal predecessors, (131), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:09:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1462 transitions. [2021-11-13 18:09:02,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 18:09:02,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:02,606 INFO L514 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:02,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:02,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:09:02,824 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:09:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1349715091, now seen corresponding path program 21 times [2021-11-13 18:09:02,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:09:02,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389619660] [2021-11-13 18:09:02,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:09:02,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:09:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:09:02,827 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:09:02,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-13 18:09:04,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-13 18:09:04,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:09:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:09:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:05,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:09,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:09:09,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389619660] [2021-11-13 18:09:09,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389619660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:09,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:09:09,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2021-11-13 18:09:09,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51066953] [2021-11-13 18:09:09,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:09,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-13 18:09:09,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:09:09,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-13 18:09:09,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 18:09:09,216 INFO L87 Difference]: Start difference. First operand 1207 states and 1462 transitions. Second operand has 51 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 51 states have internal predecessors, (133), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:09:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:23,117 INFO L93 Difference]: Finished difference Result 1234 states and 1489 transitions. [2021-11-13 18:09:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 18:09:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 51 states have internal predecessors, (133), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 120 [2021-11-13 18:09:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:23,119 INFO L225 Difference]: With dead ends: 1234 [2021-11-13 18:09:23,119 INFO L226 Difference]: Without dead ends: 1226 [2021-11-13 18:09:23,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=425, Invalid=3607, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:09:23,121 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 259 mSDsluCounter, 38933 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3996.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 39889 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.52ms SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4648.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:23,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 39889 Invalid, 2250 Unknown, 0 Unchecked, 28.52ms Time], IncrementalHoareTripleChecker [249 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 4648.28ms Time] [2021-11-13 18:09:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-11-13 18:09:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1208. [2021-11-13 18:09:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 796 states have (on average 1.7751256281407035) internal successors, (1413), 1170 states have internal predecessors, (1413), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:09:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1463 transitions. [2021-11-13 18:09:23,136 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1463 transitions. Word has length 120 [2021-11-13 18:09:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:23,136 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1463 transitions. [2021-11-13 18:09:23,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 51 states have internal predecessors, (133), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:09:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1463 transitions. [2021-11-13 18:09:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 18:09:23,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:23,138 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:23,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:23,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:09:23,353 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:09:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 575540907, now seen corresponding path program 22 times [2021-11-13 18:09:23,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:09:23,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66682314] [2021-11-13 18:09:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:09:23,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:09:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:09:23,355 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:09:23,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-13 18:09:23,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:09:23,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:09:23,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:09:23,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:24,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:28,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:09:28,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66682314] [2021-11-13 18:09:28,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66682314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:28,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:09:28,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2021-11-13 18:09:28,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043439370] [2021-11-13 18:09:28,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:28,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-13 18:09:28,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:09:28,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-13 18:09:28,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:09:28,149 INFO L87 Difference]: Start difference. First operand 1208 states and 1463 transitions. Second operand has 53 states, 51 states have (on average 2.6470588235294117) internal successors, (135), 53 states have internal predecessors, (135), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:09:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:31,650 INFO L93 Difference]: Finished difference Result 1235 states and 1491 transitions. [2021-11-13 18:09:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 18:09:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.6470588235294117) internal successors, (135), 53 states have internal predecessors, (135), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 121 [2021-11-13 18:09:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:31,653 INFO L225 Difference]: With dead ends: 1235 [2021-11-13 18:09:31,654 INFO L226 Difference]: Without dead ends: 1232 [2021-11-13 18:09:31,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=715, Invalid=3575, Unknown=0, NotChecked=0, Total=4290 [2021-11-13 18:09:31,654 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 217 mSDsluCounter, 25695 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2510.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 26651 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.16ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2941.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:31,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 26651 Invalid, 1673 Unknown, 0 Unchecked, 21.16ms Time], IncrementalHoareTripleChecker [156 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 2941.14ms Time] [2021-11-13 18:09:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-11-13 18:09:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1209. [2021-11-13 18:09:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 797 states have (on average 1.7754077791718945) internal successors, (1415), 1171 states have internal predecessors, (1415), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:09:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1465 transitions. [2021-11-13 18:09:31,670 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1465 transitions. Word has length 121 [2021-11-13 18:09:31,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:31,671 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 1465 transitions. [2021-11-13 18:09:31,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.6470588235294117) internal successors, (135), 53 states have internal predecessors, (135), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:09:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1465 transitions. [2021-11-13 18:09:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 18:09:31,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:31,672 INFO L514 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:31,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:31,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:09:31,872 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:09:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1949022317, now seen corresponding path program 23 times [2021-11-13 18:09:31,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:09:31,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211883389] [2021-11-13 18:09:31,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:09:31,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:09:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:09:31,875 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:09:31,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-13 18:09:32,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-13 18:09:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:09:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:09:32,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:33,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:38,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:09:38,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211883389] [2021-11-13 18:09:38,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211883389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:38,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:09:38,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2021-11-13 18:09:38,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318399145] [2021-11-13 18:09:38,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:38,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-13 18:09:38,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:09:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-13 18:09:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:09:38,468 INFO L87 Difference]: Start difference. First operand 1209 states and 1465 transitions. Second operand has 55 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 55 states have internal predecessors, (137), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:09:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:57,149 INFO L93 Difference]: Finished difference Result 1238 states and 1494 transitions. [2021-11-13 18:09:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 18:09:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 55 states have internal predecessors, (137), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 122 [2021-11-13 18:09:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:57,152 INFO L225 Difference]: With dead ends: 1238 [2021-11-13 18:09:57,153 INFO L226 Difference]: Without dead ends: 1230 [2021-11-13 18:09:57,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=485, Invalid=4207, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 18:09:57,154 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 313 mSDsluCounter, 37067 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4612.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 38024 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.21ms SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5377.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:57,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 38024 Invalid, 2389 Unknown, 0 Unchecked, 30.21ms Time], IncrementalHoareTripleChecker [298 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 5377.16ms Time] [2021-11-13 18:09:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-13 18:09:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1210. [2021-11-13 18:09:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 798 states have (on average 1.7744360902255638) internal successors, (1416), 1172 states have internal predecessors, (1416), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:09:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1466 transitions. [2021-11-13 18:09:57,173 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1466 transitions. Word has length 122 [2021-11-13 18:09:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:57,174 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1466 transitions. [2021-11-13 18:09:57,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 55 states have internal predecessors, (137), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:09:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1466 transitions. [2021-11-13 18:09:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:09:57,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:57,175 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:57,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:57,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:09:57,391 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:09:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1393896363, now seen corresponding path program 24 times [2021-11-13 18:09:57,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:09:57,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591789866] [2021-11-13 18:09:57,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:09:57,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:09:57,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:09:57,395 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:09:57,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-13 18:09:59,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-13 18:09:59,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:09:59,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:09:59,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:00,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:05,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:05,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591789866] [2021-11-13 18:10:05,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591789866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:10:05,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:10:05,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 57 [2021-11-13 18:10:05,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687052808] [2021-11-13 18:10:05,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:05,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-13 18:10:05,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:05,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-13 18:10:05,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2021-11-13 18:10:05,671 INFO L87 Difference]: Start difference. First operand 1210 states and 1466 transitions. Second operand has 57 states, 55 states have (on average 2.5272727272727273) internal successors, (139), 57 states have internal predecessors, (139), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:10:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:25,320 INFO L93 Difference]: Finished difference Result 1239 states and 1496 transitions. [2021-11-13 18:10:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-13 18:10:25,321 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.5272727272727273) internal successors, (139), 57 states have internal predecessors, (139), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 123 [2021-11-13 18:10:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:25,323 INFO L225 Difference]: With dead ends: 1239 [2021-11-13 18:10:25,324 INFO L226 Difference]: Without dead ends: 1236 [2021-11-13 18:10:25,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=503, Invalid=4467, Unknown=0, NotChecked=0, Total=4970 [2021-11-13 18:10:25,325 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 323 mSDsluCounter, 38035 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4995.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 38992 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.30ms SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5809.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:25,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 38992 Invalid, 2535 Unknown, 0 Unchecked, 31.30ms Time], IncrementalHoareTripleChecker [306 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 5809.27ms Time] [2021-11-13 18:10:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-11-13 18:10:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1211. [2021-11-13 18:10:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 799 states have (on average 1.774718397997497) internal successors, (1418), 1173 states have internal predecessors, (1418), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:10:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1468 transitions. [2021-11-13 18:10:25,360 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1468 transitions. Word has length 123 [2021-11-13 18:10:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:25,360 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1468 transitions. [2021-11-13 18:10:25,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.5272727272727273) internal successors, (139), 57 states have internal predecessors, (139), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:10:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1468 transitions. [2021-11-13 18:10:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 18:10:25,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:25,362 INFO L514 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:25,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:25,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:25,575 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:10:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1945160339, now seen corresponding path program 25 times [2021-11-13 18:10:25,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:25,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126730435] [2021-11-13 18:10:25,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:10:25,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:25,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:25,578 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:25,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-13 18:10:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:26,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:10:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:26,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:31,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:31,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126730435] [2021-11-13 18:10:31,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126730435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:10:31,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:10:31,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 59 [2021-11-13 18:10:31,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425946711] [2021-11-13 18:10:31,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:31,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-13 18:10:31,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-13 18:10:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:10:31,595 INFO L87 Difference]: Start difference. First operand 1211 states and 1468 transitions. Second operand has 59 states, 57 states have (on average 2.473684210526316) internal successors, (141), 59 states have internal predecessors, (141), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:10:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:35,886 INFO L93 Difference]: Finished difference Result 1242 states and 1500 transitions. [2021-11-13 18:10:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-13 18:10:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 2.473684210526316) internal successors, (141), 59 states have internal predecessors, (141), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 124 [2021-11-13 18:10:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:35,889 INFO L225 Difference]: With dead ends: 1242 [2021-11-13 18:10:35,889 INFO L226 Difference]: Without dead ends: 1239 [2021-11-13 18:10:35,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=898, Invalid=4504, Unknown=0, NotChecked=0, Total=5402 [2021-11-13 18:10:35,891 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 398 mSDsluCounter, 29557 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3070.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 30515 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.41ms SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3606.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:35,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 30515 Invalid, 2035 Unknown, 0 Unchecked, 25.41ms Time], IncrementalHoareTripleChecker [196 Valid, 1839 Invalid, 0 Unknown, 0 Unchecked, 3606.28ms Time] [2021-11-13 18:10:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-11-13 18:10:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1212. [2021-11-13 18:10:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 800 states have (on average 1.775) internal successors, (1420), 1174 states have internal predecessors, (1420), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:10:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1470 transitions. [2021-11-13 18:10:35,909 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1470 transitions. Word has length 124 [2021-11-13 18:10:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:35,909 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1470 transitions. [2021-11-13 18:10:35,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 2.473684210526316) internal successors, (141), 59 states have internal predecessors, (141), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:10:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1470 transitions. [2021-11-13 18:10:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 18:10:35,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:35,911 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:35,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:36,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:36,111 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:10:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1854474411, now seen corresponding path program 26 times [2021-11-13 18:10:36,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:36,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975088112] [2021-11-13 18:10:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:10:36,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:36,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:36,113 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:36,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-13 18:10:36,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:10:36,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:10:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:10:36,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:37,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:42,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:42,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975088112] [2021-11-13 18:10:42,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975088112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:10:42,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:10:42,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 61 [2021-11-13 18:10:42,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186536041] [2021-11-13 18:10:42,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:42,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-13 18:10:42,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-13 18:10:42,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3132, Unknown=0, NotChecked=0, Total=3660 [2021-11-13 18:10:42,663 INFO L87 Difference]: Start difference. First operand 1212 states and 1470 transitions. Second operand has 61 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 61 states have internal predecessors, (143), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:10:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:47,236 INFO L93 Difference]: Finished difference Result 1245 states and 1504 transitions. [2021-11-13 18:10:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-13 18:10:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 61 states have internal predecessors, (143), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 125 [2021-11-13 18:10:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:47,238 INFO L225 Difference]: With dead ends: 1245 [2021-11-13 18:10:47,238 INFO L226 Difference]: Without dead ends: 1242 [2021-11-13 18:10:47,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=974, Invalid=4878, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 18:10:47,241 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 514 mSDsluCounter, 27710 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3265.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 28669 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.89ms SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3820.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:47,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 28669 Invalid, 2177 Unknown, 0 Unchecked, 24.89ms Time], IncrementalHoareTripleChecker [241 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 3820.43ms Time] [2021-11-13 18:10:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-11-13 18:10:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1213. [2021-11-13 18:10:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 801 states have (on average 1.7752808988764044) internal successors, (1422), 1175 states have internal predecessors, (1422), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:10:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1472 transitions. [2021-11-13 18:10:47,258 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1472 transitions. Word has length 125 [2021-11-13 18:10:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:47,258 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1472 transitions. [2021-11-13 18:10:47,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 61 states have internal predecessors, (143), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:10:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1472 transitions. [2021-11-13 18:10:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 18:10:47,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:47,260 INFO L514 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:47,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:47,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:47,463 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:10:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash -956789357, now seen corresponding path program 27 times [2021-11-13 18:10:47,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:47,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295973222] [2021-11-13 18:10:47,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:10:47,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:47,465 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:47,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-13 18:10:49,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-13 18:10:49,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:10:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 18:10:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:50,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:10:57,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:57,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295973222] [2021-11-13 18:10:57,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295973222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:10:57,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:10:57,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 63 [2021-11-13 18:10:57,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953816107] [2021-11-13 18:10:57,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:57,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-13 18:10:57,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-13 18:10:57,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 18:10:57,810 INFO L87 Difference]: Start difference. First operand 1213 states and 1472 transitions. Second operand has 63 states, 61 states have (on average 2.377049180327869) internal successors, (145), 63 states have internal predecessors, (145), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:11:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:28,531 INFO L93 Difference]: Finished difference Result 1248 states and 1507 transitions. [2021-11-13 18:11:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-13 18:11:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 2.377049180327869) internal successors, (145), 63 states have internal predecessors, (145), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2021-11-13 18:11:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:28,533 INFO L225 Difference]: With dead ends: 1248 [2021-11-13 18:11:28,533 INFO L226 Difference]: Without dead ends: 1240 [2021-11-13 18:11:28,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=647, Invalid=5673, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:11:28,535 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 445 mSDsluCounter, 46669 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7630.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 47629 SdHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.48ms SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8933.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:28,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 47629 Invalid, 3457 Unknown, 0 Unchecked, 46.48ms Time], IncrementalHoareTripleChecker [427 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 8933.49ms Time] [2021-11-13 18:11:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-13 18:11:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1214. [2021-11-13 18:11:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 802 states have (on average 1.7743142144638404) internal successors, (1423), 1176 states have internal predecessors, (1423), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:11:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1473 transitions. [2021-11-13 18:11:28,556 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1473 transitions. Word has length 126 [2021-11-13 18:11:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:28,556 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 1473 transitions. [2021-11-13 18:11:28,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 2.377049180327869) internal successors, (145), 63 states have internal predecessors, (145), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:11:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1473 transitions. [2021-11-13 18:11:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 18:11:28,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:28,558 INFO L514 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:28,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:28,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:28,775 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:11:28,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2088347051, now seen corresponding path program 28 times [2021-11-13 18:11:28,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:28,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933447029] [2021-11-13 18:11:28,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:11:28,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:28,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:28,777 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:28,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-13 18:11:29,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:11:29,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:29,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 18:11:29,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:30,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:36,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:36,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933447029] [2021-11-13 18:11:36,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933447029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:11:36,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:11:36,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 65 [2021-11-13 18:11:36,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304053333] [2021-11-13 18:11:36,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:36,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-13 18:11:36,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:36,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-13 18:11:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=3565, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:11:36,655 INFO L87 Difference]: Start difference. First operand 1214 states and 1473 transitions. Second operand has 65 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 65 states have internal predecessors, (147), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:11:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:42,497 INFO L93 Difference]: Finished difference Result 1249 states and 1509 transitions. [2021-11-13 18:11:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-13 18:11:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 65 states have internal predecessors, (147), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 127 [2021-11-13 18:11:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:42,500 INFO L225 Difference]: With dead ends: 1249 [2021-11-13 18:11:42,500 INFO L226 Difference]: Without dead ends: 1246 [2021-11-13 18:11:42,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1102, Invalid=5540, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 18:11:42,501 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 524 mSDsluCounter, 31538 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4182.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 32498 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.97ms SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4922.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:42,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 32498 Invalid, 2525 Unknown, 0 Unchecked, 31.97ms Time], IncrementalHoareTripleChecker [270 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 4922.92ms Time] [2021-11-13 18:11:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-11-13 18:11:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1215. [2021-11-13 18:11:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 803 states have (on average 1.7745952677459527) internal successors, (1425), 1177 states have internal predecessors, (1425), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:11:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1475 transitions. [2021-11-13 18:11:42,520 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1475 transitions. Word has length 127 [2021-11-13 18:11:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:42,520 INFO L470 AbstractCegarLoop]: Abstraction has 1215 states and 1475 transitions. [2021-11-13 18:11:42,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 65 states have internal predecessors, (147), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:11:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1475 transitions. [2021-11-13 18:11:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:11:42,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:42,522 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:42,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:42,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:42,751 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:11:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1998295187, now seen corresponding path program 29 times [2021-11-13 18:11:42,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:42,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628011431] [2021-11-13 18:11:42,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:11:42,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:42,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:42,755 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:42,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-13 18:11:43,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-13 18:11:43,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:43,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-13 18:11:43,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:44,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:11:53,076 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:53,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628011431] [2021-11-13 18:11:53,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628011431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:11:53,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:11:53,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 67 [2021-11-13 18:11:53,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719126092] [2021-11-13 18:11:53,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:53,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-13 18:11:53,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-13 18:11:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 18:11:53,078 INFO L87 Difference]: Start difference. First operand 1215 states and 1475 transitions. Second operand has 67 states, 65 states have (on average 2.292307692307692) internal successors, (149), 67 states have internal predecessors, (149), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:12:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:25,650 INFO L93 Difference]: Finished difference Result 1252 states and 1512 transitions. [2021-11-13 18:12:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-13 18:12:25,651 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 2.292307692307692) internal successors, (149), 67 states have internal predecessors, (149), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 128 [2021-11-13 18:12:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:25,653 INFO L225 Difference]: With dead ends: 1252 [2021-11-13 18:12:25,653 INFO L226 Difference]: Without dead ends: 1244 [2021-11-13 18:12:25,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=721, Invalid=6419, Unknown=0, NotChecked=0, Total=7140 [2021-11-13 18:12:25,654 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 515 mSDsluCounter, 42912 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6611.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 43873 SdHoareTripleChecker+Invalid, 3534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.94ms SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7724.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:25,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 43873 Invalid, 3534 Unknown, 0 Unchecked, 36.94ms Time], IncrementalHoareTripleChecker [508 Valid, 3026 Invalid, 0 Unknown, 0 Unchecked, 7724.94ms Time] [2021-11-13 18:12:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-11-13 18:12:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1216. [2021-11-13 18:12:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 804 states have (on average 1.7736318407960199) internal successors, (1426), 1178 states have internal predecessors, (1426), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:12:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1476 transitions. [2021-11-13 18:12:25,671 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1476 transitions. Word has length 128 [2021-11-13 18:12:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:25,671 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1476 transitions. [2021-11-13 18:12:25,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 2.292307692307692) internal successors, (149), 67 states have internal predecessors, (149), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:12:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1476 transitions. [2021-11-13 18:12:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 18:12:25,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:25,673 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:25,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:25,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:25,873 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:12:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash -793312597, now seen corresponding path program 30 times [2021-11-13 18:12:25,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:25,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242969673] [2021-11-13 18:12:25,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:12:25,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:25,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:25,876 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:25,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-13 18:12:27,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-13 18:12:27,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:12:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 18:12:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:12:29,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:12:36,791 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:36,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242969673] [2021-11-13 18:12:36,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242969673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:36,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:12:36,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 69 [2021-11-13 18:12:36,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998643883] [2021-11-13 18:12:36,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:36,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-13 18:12:36,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-13 18:12:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 18:12:36,793 INFO L87 Difference]: Start difference. First operand 1216 states and 1476 transitions. Second operand has 69 states, 67 states have (on average 2.253731343283582) internal successors, (151), 69 states have internal predecessors, (151), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:13:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:08,290 INFO L93 Difference]: Finished difference Result 1253 states and 1513 transitions. [2021-11-13 18:13:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-13 18:13:08,291 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.253731343283582) internal successors, (151), 69 states have internal predecessors, (151), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 129 [2021-11-13 18:13:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:08,293 INFO L225 Difference]: With dead ends: 1253 [2021-11-13 18:13:08,293 INFO L226 Difference]: Without dead ends: 1245 [2021-11-13 18:13:08,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=743, Invalid=6739, Unknown=0, NotChecked=0, Total=7482 [2021-11-13 18:13:08,294 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 529 mSDsluCounter, 46734 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7367.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 47695 SdHoareTripleChecker+Invalid, 3821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.82ms SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8630.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:08,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 47695 Invalid, 3821 Unknown, 0 Unchecked, 39.82ms Time], IncrementalHoareTripleChecker [503 Valid, 3318 Invalid, 0 Unknown, 0 Unchecked, 8630.62ms Time] [2021-11-13 18:13:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-11-13 18:13:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1217. [2021-11-13 18:13:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 805 states have (on average 1.772670807453416) internal successors, (1427), 1179 states have internal predecessors, (1427), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:13:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1477 transitions. [2021-11-13 18:13:08,308 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1477 transitions. Word has length 129 [2021-11-13 18:13:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:08,308 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1477 transitions. [2021-11-13 18:13:08,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.253731343283582) internal successors, (151), 69 states have internal predecessors, (151), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:13:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1477 transitions. [2021-11-13 18:13:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 18:13:08,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:08,310 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:08,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:08,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:08,519 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:13:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1433807981, now seen corresponding path program 31 times [2021-11-13 18:13:08,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:08,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069417242] [2021-11-13 18:13:08,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:13:08,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:08,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:08,521 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:08,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-13 18:13:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:08,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 18:13:08,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:13:10,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:13:16,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:16,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069417242] [2021-11-13 18:13:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069417242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:13:16,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:13:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 71 [2021-11-13 18:13:16,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248542458] [2021-11-13 18:13:16,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:13:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-13 18:13:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-13 18:13:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=4267, Unknown=0, NotChecked=0, Total=4970 [2021-11-13 18:13:16,664 INFO L87 Difference]: Start difference. First operand 1217 states and 1477 transitions. Second operand has 71 states, 69 states have (on average 2.217391304347826) internal successors, (153), 71 states have internal predecessors, (153), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:13:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:23,179 INFO L93 Difference]: Finished difference Result 1254 states and 1515 transitions. [2021-11-13 18:13:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-13 18:13:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 2.217391304347826) internal successors, (153), 71 states have internal predecessors, (153), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 130 [2021-11-13 18:13:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:23,182 INFO L225 Difference]: With dead ends: 1254 [2021-11-13 18:13:23,182 INFO L226 Difference]: Without dead ends: 1251 [2021-11-13 18:13:23,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1291, Invalid=6541, Unknown=0, NotChecked=0, Total=7832 [2021-11-13 18:13:23,183 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 611 mSDsluCounter, 36332 mSDsCounter, 0 mSdLazyCounter, 2722 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4696.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 37293 SdHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.89ms SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5543.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:23,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 37293 Invalid, 3031 Unknown, 0 Unchecked, 33.89ms Time], IncrementalHoareTripleChecker [309 Valid, 2722 Invalid, 0 Unknown, 0 Unchecked, 5543.86ms Time] [2021-11-13 18:13:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-13 18:13:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1218. [2021-11-13 18:13:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 806 states have (on average 1.7729528535980148) internal successors, (1429), 1180 states have internal predecessors, (1429), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:13:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1479 transitions. [2021-11-13 18:13:23,201 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1479 transitions. Word has length 130 [2021-11-13 18:13:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:23,202 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1479 transitions. [2021-11-13 18:13:23,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 2.217391304347826) internal successors, (153), 71 states have internal predecessors, (153), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:13:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1479 transitions. [2021-11-13 18:13:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 18:13:23,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:23,203 INFO L514 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:23,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:23,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:23,422 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:13:23,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:23,422 INFO L85 PathProgramCache]: Analyzing trace with hash 185671595, now seen corresponding path program 32 times [2021-11-13 18:13:23,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:23,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249369543] [2021-11-13 18:13:23,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:13:23,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:23,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:23,424 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:23,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-13 18:13:24,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:13:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:13:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 18:13:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:13:25,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:13:32,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:32,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249369543] [2021-11-13 18:13:32,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249369543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:13:32,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:13:32,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 73 [2021-11-13 18:13:32,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672150868] [2021-11-13 18:13:32,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:13:32,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-13 18:13:32,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-13 18:13:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=4515, Unknown=0, NotChecked=0, Total=5256 [2021-11-13 18:13:32,670 INFO L87 Difference]: Start difference. First operand 1218 states and 1479 transitions. Second operand has 73 states, 71 states have (on average 2.183098591549296) internal successors, (155), 73 states have internal predecessors, (155), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:13:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:40,285 INFO L93 Difference]: Finished difference Result 1257 states and 1519 transitions. [2021-11-13 18:13:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-13 18:13:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 2.183098591549296) internal successors, (155), 73 states have internal predecessors, (155), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 131 [2021-11-13 18:13:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:40,288 INFO L225 Difference]: With dead ends: 1257 [2021-11-13 18:13:40,288 INFO L226 Difference]: Without dead ends: 1254 [2021-11-13 18:13:40,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1382, Invalid=6990, Unknown=0, NotChecked=0, Total=8372 [2021-11-13 18:13:40,289 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 565 mSDsluCounter, 38279 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5490.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 39241 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.87ms SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6466.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:40,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 39241 Invalid, 3249 Unknown, 0 Unchecked, 38.87ms Time], IncrementalHoareTripleChecker [341 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 6466.39ms Time] [2021-11-13 18:13:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-11-13 18:13:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1219. [2021-11-13 18:13:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 807 states have (on average 1.7732342007434945) internal successors, (1431), 1181 states have internal predecessors, (1431), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:13:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1481 transitions. [2021-11-13 18:13:40,305 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1481 transitions. Word has length 131 [2021-11-13 18:13:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:40,305 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 1481 transitions. [2021-11-13 18:13:40,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 2.183098591549296) internal successors, (155), 73 states have internal predecessors, (155), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:13:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1481 transitions. [2021-11-13 18:13:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 18:13:40,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:40,306 INFO L514 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:40,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:40,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:40,507 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:13:40,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1150069101, now seen corresponding path program 33 times [2021-11-13 18:13:40,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:40,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298092530] [2021-11-13 18:13:40,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:13:40,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:40,510 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:40,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-13 18:13:42,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-13 18:13:42,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:13:42,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 18:13:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:13:44,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:13:55,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:55,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298092530] [2021-11-13 18:13:55,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298092530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:13:55,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:13:55,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 75 [2021-11-13 18:13:55,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487605502] [2021-11-13 18:13:55,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:13:55,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-13 18:13:55,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:55,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-13 18:13:55,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2021-11-13 18:13:55,580 INFO L87 Difference]: Start difference. First operand 1219 states and 1481 transitions. Second operand has 75 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 75 states have internal predecessors, (157), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:14:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:44,003 INFO L93 Difference]: Finished difference Result 1260 states and 1522 transitions. [2021-11-13 18:14:44,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-13 18:14:44,004 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 75 states have internal predecessors, (157), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 132 [2021-11-13 18:14:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:44,006 INFO L225 Difference]: With dead ends: 1260 [2021-11-13 18:14:44,006 INFO L226 Difference]: Without dead ends: 1252 [2021-11-13 18:14:44,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=881, Invalid=8049, Unknown=0, NotChecked=0, Total=8930 [2021-11-13 18:14:44,008 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 641 mSDsluCounter, 49667 mSDsCounter, 0 mSdLazyCounter, 3859 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9971.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 50630 SdHoareTripleChecker+Invalid, 4478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.58ms SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 3859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11595.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:44,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 50630 Invalid, 4478 Unknown, 0 Unchecked, 49.58ms Time], IncrementalHoareTripleChecker [619 Valid, 3859 Invalid, 0 Unknown, 0 Unchecked, 11595.55ms Time] [2021-11-13 18:14:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-11-13 18:14:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1220. [2021-11-13 18:14:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 808 states have (on average 1.7722772277227723) internal successors, (1432), 1182 states have internal predecessors, (1432), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:14:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1482 transitions. [2021-11-13 18:14:44,027 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1482 transitions. Word has length 132 [2021-11-13 18:14:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:44,027 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1482 transitions. [2021-11-13 18:14:44,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 75 states have internal predecessors, (157), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:14:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1482 transitions. [2021-11-13 18:14:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-13 18:14:44,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:44,029 INFO L514 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:14:44,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:44,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:14:44,243 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:14:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash 391642283, now seen corresponding path program 34 times [2021-11-13 18:14:44,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:14:44,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861154066] [2021-11-13 18:14:44,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:14:44,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:14:44,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:14:44,246 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:14:44,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-13 18:14:44,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:14:44,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:14:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 18:14:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:14:46,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:14:54,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:14:54,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861154066] [2021-11-13 18:14:54,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861154066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:14:54,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:14:54,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 77 [2021-11-13 18:14:54,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662894605] [2021-11-13 18:14:54,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:14:54,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-13 18:14:54,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:14:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-13 18:14:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=5032, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 18:14:54,385 INFO L87 Difference]: Start difference. First operand 1220 states and 1482 transitions. Second operand has 77 states, 75 states have (on average 2.12) internal successors, (159), 77 states have internal predecessors, (159), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:15:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:02,891 INFO L93 Difference]: Finished difference Result 1261 states and 1524 transitions. [2021-11-13 18:15:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-13 18:15:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 2.12) internal successors, (159), 77 states have internal predecessors, (159), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 133 [2021-11-13 18:15:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:02,894 INFO L225 Difference]: With dead ends: 1261 [2021-11-13 18:15:02,894 INFO L226 Difference]: Without dead ends: 1258 [2021-11-13 18:15:02,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1534, Invalid=7778, Unknown=0, NotChecked=0, Total=9312 [2021-11-13 18:15:02,896 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 643 mSDsluCounter, 38322 mSDsCounter, 0 mSdLazyCounter, 3190 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6137.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 39285 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.72ms SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 3190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7232.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:02,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 39285 Invalid, 3572 Unknown, 0 Unchecked, 42.72ms Time], IncrementalHoareTripleChecker [382 Valid, 3190 Invalid, 0 Unknown, 0 Unchecked, 7232.03ms Time] [2021-11-13 18:15:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-13 18:15:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1221. [2021-11-13 18:15:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 809 states have (on average 1.7725587144622992) internal successors, (1434), 1183 states have internal predecessors, (1434), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:15:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1484 transitions. [2021-11-13 18:15:02,912 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1484 transitions. Word has length 133 [2021-11-13 18:15:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:02,913 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 1484 transitions. [2021-11-13 18:15:02,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 2.12) internal successors, (159), 77 states have internal predecessors, (159), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:15:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1484 transitions. [2021-11-13 18:15:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 18:15:02,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:02,915 INFO L514 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:15:02,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:03,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:15:03,117 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:15:03,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash 940054931, now seen corresponding path program 35 times [2021-11-13 18:15:03,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:15:03,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517575196] [2021-11-13 18:15:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:15:03,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:15:03,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:15:03,133 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:15:03,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-13 18:15:03,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-13 18:15:03,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:15:04,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 18:15:04,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:15:05,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:15:23,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:15:23,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517575196] [2021-11-13 18:15:23,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517575196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:15:23,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:15:23,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 79 [2021-11-13 18:15:23,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681734330] [2021-11-13 18:15:23,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:15:24,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-13 18:15:24,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:15:24,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-13 18:15:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2021-11-13 18:15:24,001 INFO L87 Difference]: Start difference. First operand 1221 states and 1484 transitions. Second operand has 79 states, 77 states have (on average 2.090909090909091) internal successors, (161), 79 states have internal predecessors, (161), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:16:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:16:12,417 INFO L93 Difference]: Finished difference Result 1264 states and 1527 transitions. [2021-11-13 18:16:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-13 18:16:12,418 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 2.090909090909091) internal successors, (161), 79 states have internal predecessors, (161), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 134 [2021-11-13 18:16:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:16:12,420 INFO L225 Difference]: With dead ends: 1264 [2021-11-13 18:16:12,420 INFO L226 Difference]: Without dead ends: 1256 [2021-11-13 18:16:12,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=993, Invalid=9107, Unknown=0, NotChecked=0, Total=10100 [2021-11-13 18:16:12,421 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 716 mSDsluCounter, 56329 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11719.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 57293 SdHoareTripleChecker+Invalid, 5270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.03ms SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13750.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:16:12,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 57293 Invalid, 5270 Unknown, 0 Unchecked, 57.03ms Time], IncrementalHoareTripleChecker [718 Valid, 4552 Invalid, 0 Unknown, 0 Unchecked, 13750.97ms Time] [2021-11-13 18:16:12,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-11-13 18:16:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1222. [2021-11-13 18:16:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 810 states have (on average 1.771604938271605) internal successors, (1435), 1184 states have internal predecessors, (1435), 24 states have call successors, (24), 15 states have call predecessors, (24), 16 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-11-13 18:16:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1485 transitions. [2021-11-13 18:16:12,435 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1485 transitions. Word has length 134 [2021-11-13 18:16:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:16:12,435 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 1485 transitions. [2021-11-13 18:16:12,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 2.090909090909091) internal successors, (161), 79 states have internal predecessors, (161), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:16:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1485 transitions. [2021-11-13 18:16:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:16:12,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:16:12,436 INFO L514 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:16:12,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-13 18:16:12,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:16:12,637 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr78REQUIRES_VIOLATION === [alt_bzeroErr0REQUIRES_VIOLATION, alt_bzeroErr1REQUIRES_VIOLATION, real_freeErr0ASSERT_VIOLATIONMEMORY_FREE, real_freeErr1ASSERT_VIOLATIONMEMORY_FREE (and 527 more)] === [2021-11-13 18:16:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:16:12,637 INFO L85 PathProgramCache]: Analyzing trace with hash 760977835, now seen corresponding path program 36 times [2021-11-13 18:16:12,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:16:12,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138246308] [2021-11-13 18:16:12,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:16:12,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:16:12,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:16:12,639 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:16:12,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bcfe128-0377-467c-82c2-327bca0cd1e6/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-13 18:16:15,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-13 18:16:15,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:16:15,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 18:16:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:16:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:16:17,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:16:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:16:34,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:16:34,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138246308] [2021-11-13 18:16:34,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138246308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:16:34,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:16:34,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 81 [2021-11-13 18:16:34,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171705911] [2021-11-13 18:16:34,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:16:34,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-13 18:16:34,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:16:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-13 18:16:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2021-11-13 18:16:34,416 INFO L87 Difference]: Start difference. First operand 1222 states and 1485 transitions. Second operand has 81 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 81 states have internal predecessors, (163), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8)