./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:47:17,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:47:17,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:47:17,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:47:17,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:47:17,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:47:17,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:47:17,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:47:17,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:47:17,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:47:17,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:47:17,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:47:17,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:47:17,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:47:17,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:47:17,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:47:17,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:47:17,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:47:17,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:47:17,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:47:17,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:47:17,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:47:17,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:47:17,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:47:17,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:47:17,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:47:17,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:47:17,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:47:17,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:47:17,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:47:17,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:47:17,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:47:17,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:47:17,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:47:17,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:47:17,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:47:17,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:47:17,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:47:17,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:47:17,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:47:17,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:47:17,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:47:17,171 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:47:17,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:47:17,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:47:17,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:47:17,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:47:17,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:47:17,182 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:47:17,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:47:17,182 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:47:17,182 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:47:17,184 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:47:17,184 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:47:17,184 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:47:17,185 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:47:17,185 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:47:17,185 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:47:17,186 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:47:17,186 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:47:17,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:47:17,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:47:17,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:47:17,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:47:17,188 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:47:17,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:47:17,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:47:17,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:47:17,193 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:47:17,193 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:47:17,194 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:47:17,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:47:17,194 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:47:17,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:47:17,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:47:17,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:47:17,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:47:17,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:47:17,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:47:17,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:47:17,195 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:47:17,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:47:17,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:47:17,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:47:17,196 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2021-11-23 02:47:17,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:47:17,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:47:17,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:47:17,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:47:17,491 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:47:17,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2021-11-23 02:47:17,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data/8f4d2ec46/fc8315b5428e4ec39d4a11f5e2fef4df/FLAGae563078b [2021-11-23 02:47:18,242 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:47:18,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2021-11-23 02:47:18,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data/8f4d2ec46/fc8315b5428e4ec39d4a11f5e2fef4df/FLAGae563078b [2021-11-23 02:47:18,433 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data/8f4d2ec46/fc8315b5428e4ec39d4a11f5e2fef4df [2021-11-23 02:47:18,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:47:18,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:47:18,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:47:18,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:47:18,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:47:18,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:47:18" (1/1) ... [2021-11-23 02:47:18,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db4913f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:18, skipping insertion in model container [2021-11-23 02:47:18,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:47:18" (1/1) ... [2021-11-23 02:47:18,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:47:18,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:47:18,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:47:18,957 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) [2021-11-23 02:47:18,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c9a3377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:18, skipping insertion in model container [2021-11-23 02:47:18,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:47:18,958 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 02:47:18,960 INFO L158 Benchmark]: Toolchain (without parser) took 521.26ms. Allocated memory is still 94.4MB. Free memory was 53.8MB in the beginning and 64.5MB in the end (delta: -10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:47:18,961 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 94.4MB. Free memory is still 71.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:47:18,962 INFO L158 Benchmark]: CACSL2BoogieTranslator took 517.85ms. Allocated memory is still 94.4MB. Free memory was 53.6MB in the beginning and 64.5MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:47:18,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 94.4MB. Free memory is still 71.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 517.85ms. Allocated memory is still 94.4MB. Free memory was 53.6MB in the beginning and 64.5MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:47:21,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:47:21,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:47:21,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:47:21,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:47:21,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:47:21,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:47:21,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:47:21,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:47:21,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:47:21,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:47:21,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:47:21,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:47:21,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:47:21,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:47:21,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:47:21,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:47:21,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:47:21,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:47:21,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:47:21,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:47:21,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:47:21,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:47:21,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:47:21,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:47:21,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:47:21,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:47:21,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:47:21,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:47:21,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:47:21,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:47:21,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:47:21,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:47:21,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:47:21,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:47:21,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:47:21,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:47:21,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:47:21,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:47:21,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:47:21,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:47:21,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 02:47:21,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:47:21,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:47:21,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:47:21,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:47:21,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:47:21,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:47:21,485 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:47:21,486 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:47:21,486 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:47:21,486 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:47:21,487 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:47:21,488 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:47:21,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:47:21,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:47:21,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:47:21,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:47:21,490 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:47:21,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:47:21,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:47:21,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:47:21,491 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:47:21,492 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:47:21,492 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:47:21,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:47:21,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:47:21,493 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:47:21,493 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:47:21,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:47:21,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:47:21,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:47:21,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:47:21,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:47:21,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:47:21,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:47:21,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:47:21,496 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:47:21,496 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:47:21,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:47:21,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:47:21,497 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_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2021-11-23 02:47:21,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:47:21,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:47:21,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:47:21,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:47:21,955 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:47:21,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2021-11-23 02:47:22,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data/44eeff4be/f041bd70cdce4f67ac0d87708c2df209/FLAG13c8b721c [2021-11-23 02:47:22,834 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:47:22,837 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2021-11-23 02:47:22,860 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data/44eeff4be/f041bd70cdce4f67ac0d87708c2df209/FLAG13c8b721c [2021-11-23 02:47:22,878 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/data/44eeff4be/f041bd70cdce4f67ac0d87708c2df209 [2021-11-23 02:47:22,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:47:22,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:47:22,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:47:22,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:47:22,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:47:22,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:47:22" (1/1) ... [2021-11-23 02:47:22,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9498408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:22, skipping insertion in model container [2021-11-23 02:47:22,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:47:22" (1/1) ... [2021-11-23 02:47:22,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:47:22,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:47:23,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:47:23,457 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:47:23,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:47:23,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:47:23,541 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:47:23,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:47:23,669 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:47:23,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23 WrapperNode [2021-11-23 02:47:23,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:47:23,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:47:23,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:47:23,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:47:23,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,730 INFO L137 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 54 [2021-11-23 02:47:23,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:47:23,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:47:23,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:47:23,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:47:23,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:47:23,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:47:23,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:47:23,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:47:23,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (1/1) ... [2021-11-23 02:47:23,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:47:23,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:23,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:47:23,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:47:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:47:23,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:47:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:47:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:47:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:47:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:47:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:47:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:47:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:47:23,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:47:24,048 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:47:24,050 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:47:24,337 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:47:24,344 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:47:24,344 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:47:24,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:47:24 BoogieIcfgContainer [2021-11-23 02:47:24,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:47:24,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:47:24,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:47:24,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:47:24,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:47:22" (1/3) ... [2021-11-23 02:47:24,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466d3e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:47:24, skipping insertion in model container [2021-11-23 02:47:24,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:23" (2/3) ... [2021-11-23 02:47:24,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466d3e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:47:24, skipping insertion in model container [2021-11-23 02:47:24,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:47:24" (3/3) ... [2021-11-23 02:47:24,356 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test18_2.i [2021-11-23 02:47:24,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:47:24,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-23 02:47:24,435 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:47:24,443 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 [2021-11-23 02:47:24,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-23 02:47:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:47:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:47:24,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:24,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:24,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:47:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1121226903, now seen corresponding path program 1 times [2021-11-23 02:47:24,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:47:24,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191232023] [2021-11-23 02:47:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:24,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:47:24,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:47:24,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:47:24,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:47:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:24,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:47:24,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:24,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:24,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:47:24,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191232023] [2021-11-23 02:47:24,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191232023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:24,824 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:24,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:47:24,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520075538] [2021-11-23 02:47:24,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:24,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:47:24,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:47:24,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:47:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:47:24,874 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:47:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:25,092 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-11-23 02:47:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:47:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:47:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:25,105 INFO L225 Difference]: With dead ends: 74 [2021-11-23 02:47:25,117 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 02:47:25,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:47:25,125 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 33 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:25,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 142 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:47:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 02:47:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2021-11-23 02:47:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:47:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-23 02:47:25,189 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 11 [2021-11-23 02:47:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:25,191 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-23 02:47:25,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:47:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-23 02:47:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:47:25,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:25,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:25,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:25,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:47:25,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:47:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2008730584, now seen corresponding path program 1 times [2021-11-23 02:47:25,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:47:25,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75946285] [2021-11-23 02:47:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:25,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:47:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:47:25,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:47:25,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:47:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:47:25,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:25,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:25,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:47:25,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75946285] [2021-11-23 02:47:25,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75946285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:25,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:25,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:47:25,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771940236] [2021-11-23 02:47:25,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:25,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:47:25,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:47:25,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:47:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:47:25,591 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:47:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:25,736 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-11-23 02:47:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:47:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:47:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:25,739 INFO L225 Difference]: With dead ends: 69 [2021-11-23 02:47:25,739 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 02:47:25,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:47:25,741 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:25,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 145 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:47:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 02:47:25,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-11-23 02:47:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.53125) internal successors, (49), 42 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:47:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-11-23 02:47:25,752 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 11 [2021-11-23 02:47:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:25,752 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-11-23 02:47:25,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:47:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-11-23 02:47:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:47:25,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:25,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:25,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:25,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:47:25,964 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:47:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash 398308128, now seen corresponding path program 1 times [2021-11-23 02:47:25,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:47:25,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189167414] [2021-11-23 02:47:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:25,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:47:25,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:47:25,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:47:26,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:47:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:26,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:47:26,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:26,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:26,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:47:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189167414] [2021-11-23 02:47:26,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189167414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:26,183 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:47:26,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:47:26,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930728756] [2021-11-23 02:47:26,184 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:26,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:47:26,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:47:26,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:47:26,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:47:26,193 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:47:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:26,316 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2021-11-23 02:47:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:47:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2021-11-23 02:47:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:26,318 INFO L225 Difference]: With dead ends: 88 [2021-11-23 02:47:26,319 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 02:47:26,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:47:26,321 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 176 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:26,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 77 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:47:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 02:47:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-11-23 02:47:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 50 states have internal predecessors, (59), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-23 02:47:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2021-11-23 02:47:26,334 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 12 [2021-11-23 02:47:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:26,335 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2021-11-23 02:47:26,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:47:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2021-11-23 02:47:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:47:26,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:26,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:26,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:26,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:47:26,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:47:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1387011810, now seen corresponding path program 1 times [2021-11-23 02:47:26,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:47:26,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372090117] [2021-11-23 02:47:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:26,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:47:26,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:47:26,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:47:26,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:47:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:47:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:26,668 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 [2021-11-23 02:47:26,876 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:47:26,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-23 02:47:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:27,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:39,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:47:39,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372090117] [2021-11-23 02:47:39,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372090117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:47:39,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [757656035] [2021-11-23 02:47:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:39,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:47:39,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:47:39,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:47:39,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 02:47:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:40,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:47:40,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:40,057 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 [2021-11-23 02:47:40,160 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:47:40,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-23 02:47:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:48,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [757656035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:47:48,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960374978] [2021-11-23 02:47:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:48,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:48,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:47:48,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:47:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:47:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:49,042 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 [2021-11-23 02:47:49,141 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:47:49,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-23 02:47:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:49,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:57,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960374978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:47:57,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:47:57,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-23 02:47:57,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547794093] [2021-11-23 02:47:57,837 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:47:57,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:47:57,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:47:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:47:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2021-11-23 02:47:57,839 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:47:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:57,921 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2021-11-23 02:47:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:47:57,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-11-23 02:47:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:57,925 INFO L225 Difference]: With dead ends: 75 [2021-11-23 02:47:57,925 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 02:47:57,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=39, Invalid=138, Unknown=5, NotChecked=0, Total=182 [2021-11-23 02:47:57,927 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:57,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 194 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 104 Unchecked, 0.0s Time] [2021-11-23 02:47:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 02:47:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2021-11-23 02:47:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 52 states have internal predecessors, (64), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-23 02:47:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2021-11-23 02:47:57,938 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 18 [2021-11-23 02:47:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:57,938 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2021-11-23 02:47:57,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:47:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2021-11-23 02:47:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:47:57,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:57,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:57,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:58,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:58,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:58,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:47:58,566 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:47:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:58,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1387011811, now seen corresponding path program 1 times [2021-11-23 02:47:58,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:47:58,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134306608] [2021-11-23 02:47:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:58,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:47:58,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:47:58,569 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:47:58,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:47:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:47:58,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:58,661 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 [2021-11-23 02:47:58,672 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 [2021-11-23 02:48:00,988 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:48:00,989 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 [2021-11-23 02:48:01,002 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:48:01,003 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 [2021-11-23 02:48:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:01,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:18,499 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 31 treesize of output 29 [2021-11-23 02:48:19,025 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 29 treesize of output 27 [2021-11-23 02:48:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:19,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134306608] [2021-11-23 02:48:19,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134306608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [563300060] [2021-11-23 02:48:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:19,196 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:48:19,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:48:19,213 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:48:19,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 02:48:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:48:19,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:19,335 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 [2021-11-23 02:48:19,345 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 [2021-11-23 02:48:19,530 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:48:19,531 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 32 treesize of output 34 [2021-11-23 02:48:19,541 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:48:19,541 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 26 treesize of output 26 [2021-11-23 02:48:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:19,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:47,568 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 31 treesize of output 29 [2021-11-23 02:48:48,238 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 [2021-11-23 02:48:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:48,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [563300060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:48,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988575529] [2021-11-23 02:48:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:48,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:48,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:48,295 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:48:48,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:48:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:48,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:48:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:48,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:48:48,399 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 [2021-11-23 02:48:48,579 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:48:48,579 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 32 treesize of output 34 [2021-11-23 02:48:48,591 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:48:48,591 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 26 treesize of output 26 [2021-11-23 02:48:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:48,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:33,667 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 32 treesize of output 30 [2021-11-23 02:49:34,197 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 31 treesize of output 29 [2021-11-23 02:49:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:34,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988575529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:34,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:49:34,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 21 [2021-11-23 02:49:34,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067542510] [2021-11-23 02:49:34,225 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:34,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:49:34,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:49:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=375, Unknown=32, NotChecked=0, Total=462 [2021-11-23 02:49:34,227 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 02:49:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:44,855 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2021-11-23 02:49:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:49:44,856 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 18 [2021-11-23 02:49:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:44,860 INFO L225 Difference]: With dead ends: 176 [2021-11-23 02:49:44,861 INFO L226 Difference]: Without dead ends: 176 [2021-11-23 02:49:44,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 85.5s TimeCoverageRelationStatistics Valid=108, Invalid=668, Unknown=36, NotChecked=0, Total=812 [2021-11-23 02:49:44,863 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 175 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:44,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 661 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 328 Invalid, 0 Unknown, 551 Unchecked, 1.1s Time] [2021-11-23 02:49:44,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-23 02:49:44,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 95. [2021-11-23 02:49:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 83 states have internal predecessors, (111), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-23 02:49:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 132 transitions. [2021-11-23 02:49:44,881 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 132 transitions. Word has length 18 [2021-11-23 02:49:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:44,882 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 132 transitions. [2021-11-23 02:49:44,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 4 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 02:49:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 132 transitions. [2021-11-23 02:49:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:49:44,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:44,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:44,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:45,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:45,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-23 02:49:45,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:45,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:49:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash 881453185, now seen corresponding path program 1 times [2021-11-23 02:49:45,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:45,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848780760] [2021-11-23 02:49:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:45,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:45,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:45,496 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:45,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:49:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:45,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:49:45,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:45,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:45,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:45,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848780760] [2021-11-23 02:49:45,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848780760] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:49:45,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:49:45,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:49:45,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397121506] [2021-11-23 02:49:45,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:45,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:45,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:45,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:45,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:45,759 INFO L87 Difference]: Start difference. First operand 95 states and 132 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:49:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:45,823 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2021-11-23 02:49:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:49:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-23 02:49:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:45,825 INFO L225 Difference]: With dead ends: 84 [2021-11-23 02:49:45,825 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 02:49:45,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:45,826 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:45,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 159 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:49:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 02:49:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-23 02:49:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 73 states have internal predecessors, (94), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 02:49:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2021-11-23 02:49:45,841 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 18 [2021-11-23 02:49:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:45,841 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2021-11-23 02:49:45,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:49:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2021-11-23 02:49:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:49:45,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:45,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:45,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:46,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:46,049 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:49:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1478437294, now seen corresponding path program 1 times [2021-11-23 02:49:46,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:46,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139330481] [2021-11-23 02:49:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:46,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:46,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:46,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:46,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:49:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:46,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:49:46,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:46,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:46,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:46,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139330481] [2021-11-23 02:49:46,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139330481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:46,220 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:46,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:49:46,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398508989] [2021-11-23 02:49:46,221 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:46,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:46,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:46,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:46,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:46,222 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:49:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:46,285 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2021-11-23 02:49:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-23 02:49:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:46,287 INFO L225 Difference]: With dead ends: 94 [2021-11-23 02:49:46,288 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 02:49:46,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:49:46,290 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:46,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 166 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:49:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 02:49:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2021-11-23 02:49:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.492063492063492) internal successors, (94), 73 states have internal predecessors, (94), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 02:49:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2021-11-23 02:49:46,301 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 20 [2021-11-23 02:49:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:46,301 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2021-11-23 02:49:46,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:49:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2021-11-23 02:49:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:49:46,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:46,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:46,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:46,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:46,515 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:49:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:46,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1073719666, now seen corresponding path program 1 times [2021-11-23 02:49:46,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:46,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063988706] [2021-11-23 02:49:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:46,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:46,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:46,517 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:46,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:49:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:46,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:49:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:49:46,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:49:46,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:46,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063988706] [2021-11-23 02:49:46,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063988706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:46,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:46,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:49:46,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489921885] [2021-11-23 02:49:46,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:46,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:49:46,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:49:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:49:46,685 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:49:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:46,806 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2021-11-23 02:49:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:49:46,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-11-23 02:49:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:46,808 INFO L225 Difference]: With dead ends: 82 [2021-11-23 02:49:46,808 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 02:49:46,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:49:46,809 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:46,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 142 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:49:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 02:49:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-11-23 02:49:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 65 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 02:49:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2021-11-23 02:49:46,826 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 20 [2021-11-23 02:49:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:46,826 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2021-11-23 02:49:46,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:49:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2021-11-23 02:49:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:49:46,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:46,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:46,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 02:49:47,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:47,033 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:49:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1074427268, now seen corresponding path program 1 times [2021-11-23 02:49:47,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:47,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335335121] [2021-11-23 02:49:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:47,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:47,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:47,036 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:47,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:49:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:49:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:47,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:47,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:47,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335335121] [2021-11-23 02:49:47,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335335121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:47,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1461368432] [2021-11-23 02:49:47,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:47,553 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:47,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:49:47,554 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:49:47,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 02:49:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:47,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:49:47,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:47,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:47,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1461368432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:47,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043479509] [2021-11-23 02:49:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:47,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:47,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:47,821 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:47,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:49:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:47,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:49:47,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:47,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:48,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043479509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:48,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:49:48,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2021-11-23 02:49:48,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495420740] [2021-11-23 02:49:48,094 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:48,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:49:48,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:49:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:49:48,095 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:49:48,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:48,374 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-23 02:49:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:49:48,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 21 [2021-11-23 02:49:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:48,376 INFO L225 Difference]: With dead ends: 78 [2021-11-23 02:49:48,377 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 02:49:48,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:49:48,387 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:48,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 132 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2021-11-23 02:49:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 02:49:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-23 02:49:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.368421052631579) internal successors, (78), 65 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 02:49:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2021-11-23 02:49:48,398 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 21 [2021-11-23 02:49:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:48,399 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2021-11-23 02:49:48,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 02:49:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2021-11-23 02:49:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:49:48,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:48,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:48,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:48,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:48,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-23 02:49:49,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:49,012 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:49:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2128418719, now seen corresponding path program 1 times [2021-11-23 02:49:49,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:49,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691220507] [2021-11-23 02:49:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:49,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:49,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:49,014 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:49,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 02:49:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:49,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:49:49,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:49,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:56,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:56,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691220507] [2021-11-23 02:49:56,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691220507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:56,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1587766823] [2021-11-23 02:49:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:56,081 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:56,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:49:56,082 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:49:56,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 02:49:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:49:56,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:56,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:02,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1587766823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:50:02,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099411824] [2021-11-23 02:50:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:02,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:02,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:02,315 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:02,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:50:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:02,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:50:02,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:50:02,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:07,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099411824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:50:07,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:50:07,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6, 8, 7, 8] total 20 [2021-11-23 02:50:07,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20203348] [2021-11-23 02:50:07,814 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:50:07,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:50:07,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:50:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=316, Unknown=46, NotChecked=0, Total=420 [2021-11-23 02:50:07,817 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 21 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-23 02:50:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:08,466 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2021-11-23 02:50:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:50:08,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 24 [2021-11-23 02:50:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:08,469 INFO L225 Difference]: With dead ends: 98 [2021-11-23 02:50:08,469 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 02:50:08,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=50, NotChecked=0, Total=650 [2021-11-23 02:50:08,470 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 69 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:08,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 431 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2021-11-23 02:50:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 02:50:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-11-23 02:50:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 66 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 02:50:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2021-11-23 02:50:08,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 24 [2021-11-23 02:50:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:08,477 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2021-11-23 02:50:08,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-23 02:50:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2021-11-23 02:50:08,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:50:08,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:08,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:08,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:08,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:08,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:09,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:09,101 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:50:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1844216073, now seen corresponding path program 1 times [2021-11-23 02:50:09,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:09,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613567468] [2021-11-23 02:50:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:09,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:09,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:09,104 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:09,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 02:50:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:50:09,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:09,214 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 [2021-11-23 02:50:09,345 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:50:09,346 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 17 treesize of output 22 [2021-11-23 02:50:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:50:09,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:50:09,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:09,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613567468] [2021-11-23 02:50:09,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613567468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:09,597 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:09,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 6 [2021-11-23 02:50:09,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849045475] [2021-11-23 02:50:09,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:09,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:50:09,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:50:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:50:09,599 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:09,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:09,702 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-11-23 02:50:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:50:09,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-23 02:50:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:09,704 INFO L225 Difference]: With dead ends: 86 [2021-11-23 02:50:09,704 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 02:50:09,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:50:09,705 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:09,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 129 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-11-23 02:50:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 02:50:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-11-23 02:50:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 69 states have internal predecessors, (82), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 02:50:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2021-11-23 02:50:09,712 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 28 [2021-11-23 02:50:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:09,713 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2021-11-23 02:50:09,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:50:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2021-11-23 02:50:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:50:09,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:09,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:09,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:09,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:50:09,932 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:50:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1844216072, now seen corresponding path program 1 times [2021-11-23 02:50:09,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857850530] [2021-11-23 02:50:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:09,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:09,934 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:09,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 02:50:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:50:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:10,053 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 [2021-11-23 02:50:10,068 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 [2021-11-23 02:50:12,391 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:50:12,392 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 31 treesize of output 33 [2021-11-23 02:50:12,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:50:12,417 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 25 treesize of output 25 [2021-11-23 02:50:12,713 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:50:12,713 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 30 treesize of output 32 [2021-11-23 02:50:12,727 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:50:12,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:50:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:50:12,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:23,700 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ BitVec 32)) (|v_ldv_malloc_#res.base_140| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_139|)))))) (or (not (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| .cse0) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) .cse0)))) (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29|))))))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_140| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29|))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| .cse1) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) .cse1)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_140|)))))))) is different from false [2021-11-23 02:50:28,250 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:50:28,250 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 47 treesize of output 46 [2021-11-23 02:51:06,620 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 31 treesize of output 29 [2021-11-23 02:51:07,466 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 31 treesize of output 29 [2021-11-23 02:51:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 02:51:07,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857850530] [2021-11-23 02:51:07,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857850530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136198902] [2021-11-23 02:51:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:07,767 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:51:07,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:51:07,773 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:51:07,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 02:51:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:51:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:07,945 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 [2021-11-23 02:51:07,954 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 [2021-11-23 02:51:08,205 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:51:08,205 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 30 treesize of output 32 [2021-11-23 02:51:08,225 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:51:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:51:08,412 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:51:08,413 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 [2021-11-23 02:51:08,426 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:51:08,426 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 [2021-11-23 02:51:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:51:08,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:29,534 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33| (_ BitVec 32)) (|v_ldv_malloc_#res.base_152| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_152|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_152| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33|))) (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| .cse0) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) .cse0)))) (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33|)))) (not (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| .cse1) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) .cse1))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_139|)))))))))) is different from false [2021-11-23 02:51:31,935 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:51:31,936 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 47 treesize of output 46 [2021-11-23 02:51:48,869 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ldv_malloc_#res.base_155| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_155|)))) (or (not (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (exists ((v_ldv_malloc_~size_146 (_ BitVec 32)) (v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_155| v_ldv_malloc_~size_146) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|)))) (and (forall ((v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|))) is different from false [2021-11-23 02:52:13,867 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ BitVec 32)) (|v_ldv_malloc_#res.base_156| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ldv_malloc_#res.base_155| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_155|)))) (or (not (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (exists ((v_ldv_malloc_~size_146 (_ BitVec 32)) (v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_155| v_ldv_malloc_~size_146) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32)) (v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store (store |c_#length| |v_ldv_malloc_#res.base_156| ldv_malloc_~size) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_156|)))))) is different from false [2021-11-23 02:52:29,812 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 60 treesize of output 58 [2021-11-23 02:52:32,632 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 31 treesize of output 29 [2021-11-23 02:52:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-23 02:52:32,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136198902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:52:32,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151958298] [2021-11-23 02:52:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:32,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:32,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:52:32,664 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:52:32,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 02:52:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:32,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:52:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:32,774 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 [2021-11-23 02:52:32,785 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 [2021-11-23 02:52:33,016 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:52:33,016 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 [2021-11-23 02:52:33,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:52:33,038 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 [2021-11-23 02:52:33,301 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:52:33,301 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 [2021-11-23 02:52:33,340 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:52:33,341 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 [2021-11-23 02:52:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:52:33,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:22,985 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:53:22,986 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 47 treesize of output 46 [2021-11-23 02:53:47,615 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| (_ BitVec 32))) (let ((.cse3 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse2 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse3))) (or (exists ((v_ldv_malloc_~size_158 (_ BitVec 32)) (|v_ldv_malloc_#res.base_167| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse0 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse1))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)))) (not (bvule .cse0 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse1)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_167|))) (bvule .cse0 (select (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|)))))) (and (bvule .cse2 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse3)) (forall ((v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|) (not (bvule .cse2 (select |c_#length| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|))))))) is different from false [2021-11-23 02:54:34,617 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_168| (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| (_ BitVec 32))) (let ((.cse3 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse2 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse3))) (or (exists ((v_ldv_malloc_~size_158 (_ BitVec 32)) (|v_ldv_malloc_#res.base_167| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse0 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse1))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)))) (not (bvule .cse0 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse1)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_167|))) (bvule .cse0 (select (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_168|))))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|) (not (bvule .cse2 (select (store |c_#length| |v_ldv_malloc_#res.base_168| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|))) (and (forall ((v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_#length| |v_ldv_malloc_#res.base_168| ldv_malloc_~size) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|))) (bvule .cse2 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse3))))))) is different from false [2021-11-23 02:55:12,846 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 79 treesize of output 77 [2021-11-23 02:55:16,245 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 74 treesize of output 72 [2021-11-23 02:55:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-23 02:55:16,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151958298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:16,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:55:16,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11, 14, 11, 14] total 39 [2021-11-23 02:55:16,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422041978] [2021-11-23 02:55:16,810 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:55:16,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 02:55:16,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 02:55:16,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=975, Unknown=51, NotChecked=414, Total=1560 [2021-11-23 02:55:16,813 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 40 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 9 states have call successors, (11), 8 states have call predecessors, (11), 10 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-23 02:55:19,826 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ BitVec 32)) (|v_ldv_malloc_#res.base_156| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ldv_malloc_#res.base_155| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_155|)))) (or (not (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (exists ((v_ldv_malloc_~size_146 (_ BitVec 32)) (v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_155| v_ldv_malloc_~size_146) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32)) (v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store (store |c_#length| |v_ldv_malloc_#res.base_156| ldv_malloc_~size) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_156|)))))) (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ BitVec 32)) (|v_ldv_malloc_#res.base_140| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_139|)))))) (or (not (let ((.cse2 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| .cse2) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) .cse2)))) (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29|))))))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_140| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29|))) (let ((.cse3 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| .cse3) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) .cse3)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_140|)))))))) (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33| (_ BitVec 32)) (|v_ldv_malloc_#res.base_152| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_152|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_152| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33|))) (let ((.cse4 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| .cse4) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) .cse4)))) (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33|)))) (not (let ((.cse5 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| .cse5) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) .cse5))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_139|)))))))))) (forall ((|v_ldv_malloc_#res.base_168| (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| (_ BitVec 32))) (let ((.cse9 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse8 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse9))) (or (exists ((v_ldv_malloc_~size_158 (_ BitVec 32)) (|v_ldv_malloc_#res.base_167| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (let ((.cse7 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse6 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse7))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)))) (not (bvule .cse6 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse7)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_167|))) (bvule .cse6 (select (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_168|))))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|) (not (bvule .cse8 (select (store |c_#length| |v_ldv_malloc_#res.base_168| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|))) (and (forall ((v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_#length| |v_ldv_malloc_#res.base_168| ldv_malloc_~size) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|))) (bvule .cse8 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse9)))))))) is different from false [2021-11-23 02:55:21,953 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ BitVec 32)) (|v_ldv_malloc_#res.base_156| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ldv_malloc_#res.base_155| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_155|)))) (or (not (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (exists ((v_ldv_malloc_~size_146 (_ BitVec 32)) (v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_155| v_ldv_malloc_~size_146) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32)) (v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store (store |c_#length| |v_ldv_malloc_#res.base_156| ldv_malloc_~size) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_156|)))))) (= |c_old(#valid)| |c_#valid|) (= c_ldv_malloc_~size |c_ldv_malloc_#in~size|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ BitVec 32)) (|v_ldv_malloc_#res.base_140| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_139|)))))) (or (not (let ((.cse2 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| .cse2) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) .cse2)))) (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29|))))))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_140| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29|))) (let ((.cse3 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| .cse3) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) .cse3)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_140|)))))))) (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33| (_ BitVec 32)) (|v_ldv_malloc_#res.base_152| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_152|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_152| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33|))) (let ((.cse4 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| .cse4) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) .cse4)))) (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33|)))) (not (let ((.cse5 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| .cse5) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) .cse5))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_139|)))))))))) (forall ((|v_ldv_malloc_#res.base_168| (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| (_ BitVec 32))) (let ((.cse9 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse8 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse9))) (or (exists ((v_ldv_malloc_~size_158 (_ BitVec 32)) (|v_ldv_malloc_#res.base_167| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (let ((.cse7 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse6 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse7))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)))) (not (bvule .cse6 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse7)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_167|))) (bvule .cse6 (select (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_168|))))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|) (not (bvule .cse8 (select (store |c_#length| |v_ldv_malloc_#res.base_168| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|))) (and (forall ((v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_#length| |v_ldv_malloc_#res.base_168| ldv_malloc_~size) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|))) (bvule .cse8 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse9)))))))) is different from false [2021-11-23 02:55:24,036 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ldv_malloc_~size (_ BitVec 32)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| ldv_malloc_~size) |c_#length|) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |ldv_malloc_#res.base|)))))))) (= (select |c_#length| |c_ldv_malloc_#res.base|) |c_ldv_malloc_#in~size|) (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ldv_malloc_#res.base_155| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_155|)))) (or (not (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (exists ((v_ldv_malloc_~size_146 (_ BitVec 32)) (v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_155| v_ldv_malloc_~size_146) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|)))) (and (forall ((v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34|))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_16| (_ bv4 32)))) (bvule (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv4 32)) (bvadd .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_14| (_ bv8 32))))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_34| |v_ldv_malloc_#res.base_139|))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ldv_malloc_#res.base|))) (forall ((|v_ldv_malloc_#res.base_139| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| (_ BitVec 32))) (let ((.cse5 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse4 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse5))) (or (exists ((v_ldv_malloc_~size_158 (_ BitVec 32)) (|v_ldv_malloc_#res.base_167| (_ BitVec 32)) (|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (let ((.cse3 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (let ((.cse2 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv4 32) .cse3))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)))) (not (bvule .cse2 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse3)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_167|))) (bvule .cse2 (select (store |c_old(#length)| |v_ldv_malloc_#res.base_167| v_ldv_malloc_~size_158) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|)))))) (and (bvule .cse4 (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) .cse5)) (forall ((v_ldv_malloc_~size_130 (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ bv8 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|)))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38| |v_ldv_malloc_#res.base_139|) (not (bvule .cse4 (select |c_#length| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_38|))))))) (= |c_ldv_malloc_#res.offset| (_ bv0 32))) is different from false [2021-11-23 02:55:40,172 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ BitVec 32)) (|v_ldv_malloc_#res.base_140| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_139|)))))) (or (not (let ((.cse0 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| .cse0) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) .cse0)))) (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29|))))))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_140| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_29|))) (let ((.cse1 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_11| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| .cse1) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_9| (_ bv4 32) .cse1)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_140|)))))))) (forall ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33| (_ BitVec 32)) (|v_ldv_malloc_#res.base_152| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_152|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_152| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33|))) (let ((.cse2 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| .cse2) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) .cse2)))) (exists ((|v_ldv_malloc_#res.base_139| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_139| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_33|)))) (not (let ((.cse3 (bvmul |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_15| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| .cse3) (bvadd |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_13| (_ bv4 32) .cse3))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_139|))))))))))) is different from false [2021-11-23 02:56:05,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:05,763 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2021-11-23 02:56:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:56:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 9 states have call successors, (11), 8 states have call predecessors, (11), 10 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 28 [2021-11-23 02:56:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:05,766 INFO L225 Difference]: With dead ends: 103 [2021-11-23 02:56:05,766 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 02:56:05,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 183.4s TimeCoverageRelationStatistics Valid=188, Invalid=1353, Unknown=59, NotChecked=850, Total=2450 [2021-11-23 02:56:05,770 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:05,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 782 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 683 Unchecked, 0.5s Time] [2021-11-23 02:56:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 02:56:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-11-23 02:56:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 87 states have internal predecessors, (101), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-23 02:56:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2021-11-23 02:56:05,779 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 28 [2021-11-23 02:56:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:05,780 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2021-11-23 02:56:05,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 9 states have call successors, (11), 8 states have call predecessors, (11), 10 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-23 02:56:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2021-11-23 02:56:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:56:05,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:05,782 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:05,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:06,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-23 02:56:06,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:06,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:06,397 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:56:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1815586921, now seen corresponding path program 1 times [2021-11-23 02:56:06,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:06,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665865422] [2021-11-23 02:56:06,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:06,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:06,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:06,400 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:06,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 02:56:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:06,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:56:06,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:56:06,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:56:06,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665865422] [2021-11-23 02:56:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665865422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:06,792 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:06,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:56:06,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155904103] [2021-11-23 02:56:06,793 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:56:06,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:56:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:56:06,794 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:56:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:06,840 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-11-23 02:56:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:56:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-23 02:56:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:06,842 INFO L225 Difference]: With dead ends: 83 [2021-11-23 02:56:06,842 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 02:56:06,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:56:06,843 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:06,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 141 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:56:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 02:56:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-11-23 02:56:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 02:56:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-11-23 02:56:06,850 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 28 [2021-11-23 02:56:06,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:06,851 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-11-23 02:56:06,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:56:06,851 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-11-23 02:56:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:56:06,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:06,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:06,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:07,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:07,075 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:56:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1022360221, now seen corresponding path program 1 times [2021-11-23 02:56:07,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:07,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592669041] [2021-11-23 02:56:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:07,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:07,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:07,077 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:07,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 02:56:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:56:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:07,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:08,962 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 11 treesize of output 9 [2021-11-23 02:56:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:09,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592669041] [2021-11-23 02:56:09,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592669041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [273735834] [2021-11-23 02:56:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:09,710 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:09,725 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:09,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 02:56:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:09,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:56:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:10,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:14,987 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 11 treesize of output 9 [2021-11-23 02:56:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:15,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [273735834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:15,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502323237] [2021-11-23 02:56:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:15,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:15,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:15,211 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:15,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 02:56:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:56:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:16,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:24,046 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 11 treesize of output 9 [2021-11-23 02:56:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:25,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502323237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:25,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:56:25,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 10, 10] total 28 [2021-11-23 02:56:25,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80296040] [2021-11-23 02:56:25,198 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:56:25,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 02:56:25,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 02:56:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=690, Unknown=4, NotChecked=0, Total=812 [2021-11-23 02:56:25,200 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 29 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 9 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-23 02:56:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:30,651 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-11-23 02:56:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:56:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 9 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) Word has length 30 [2021-11-23 02:56:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:30,654 INFO L225 Difference]: With dead ends: 116 [2021-11-23 02:56:30,654 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 02:56:30,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=218, Invalid=1184, Unknown=4, NotChecked=0, Total=1406 [2021-11-23 02:56:30,656 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:30,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 406 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 422 Invalid, 0 Unknown, 46 Unchecked, 3.1s Time] [2021-11-23 02:56:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 02:56:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2021-11-23 02:56:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 82 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 02:56:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-11-23 02:56:30,663 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 30 [2021-11-23 02:56:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:30,664 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-11-23 02:56:30,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 9 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-23 02:56:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-11-23 02:56:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:56:30,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:30,666 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:30,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:30,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:31,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:31,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:31,270 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:56:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:31,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1628395789, now seen corresponding path program 1 times [2021-11-23 02:56:31,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:31,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695396614] [2021-11-23 02:56:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:31,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:31,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:31,272 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:31,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 02:56:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:56:31,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:31,563 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 15 treesize of output 11 [2021-11-23 02:56:31,939 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 15 treesize of output 7 [2021-11-23 02:56:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:56:31,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:56:32,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:32,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695396614] [2021-11-23 02:56:32,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695396614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:32,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1936306388] [2021-11-23 02:56:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:32,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:32,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:32,439 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:32,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 02:56:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:32,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:56:32,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:32,669 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 15 treesize of output 11 [2021-11-23 02:56:32,894 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 15 treesize of output 7 [2021-11-23 02:56:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:56:32,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:56:33,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1936306388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799145709] [2021-11-23 02:56:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:33,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:33,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:33,092 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:33,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 02:56:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:56:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:33,665 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 15 treesize of output 11 [2021-11-23 02:56:34,173 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 15 treesize of output 7 [2021-11-23 02:56:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:56:34,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:56:35,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799145709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:35,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:56:35,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11, 8, 13, 10] total 29 [2021-11-23 02:56:35,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406443292] [2021-11-23 02:56:35,266 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:56:35,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 02:56:35,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 02:56:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:56:35,268 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 30 states, 28 states have (on average 2.0) internal successors, (56), 24 states have internal predecessors, (56), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-23 02:56:39,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:40,425 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2021-11-23 02:56:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:56:40,427 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 24 states have internal predecessors, (56), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 31 [2021-11-23 02:56:40,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:40,428 INFO L225 Difference]: With dead ends: 127 [2021-11-23 02:56:40,428 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 02:56:40,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 150 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 02:56:40,430 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 389 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:40,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 310 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 466 Invalid, 1 Unknown, 34 Unchecked, 3.5s Time] [2021-11-23 02:56:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 02:56:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2021-11-23 02:56:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 84 states have internal predecessors, (101), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 02:56:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2021-11-23 02:56:40,438 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 31 [2021-11-23 02:56:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:40,439 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2021-11-23 02:56:40,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 24 states have internal predecessors, (56), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-23 02:56:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2021-11-23 02:56:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:56:40,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:40,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:40,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:40,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:40,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:41,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:41,043 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:56:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1304384650, now seen corresponding path program 1 times [2021-11-23 02:56:41,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:41,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633717937] [2021-11-23 02:56:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:41,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:41,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:41,046 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:41,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 02:56:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:56:41,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:56:41,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:56:41,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633717937] [2021-11-23 02:56:41,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633717937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [74984573] [2021-11-23 02:56:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:41,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:41,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:41,712 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:41,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-23 02:56:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:56:41,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:56:42,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:56:42,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [74984573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523920205] [2021-11-23 02:56:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:42,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:42,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:42,137 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:42,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 02:56:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:56:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:56:42,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:56:42,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523920205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:42,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:56:42,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-23 02:56:42,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707776277] [2021-11-23 02:56:42,539 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:56:42,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:56:42,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:56:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:56:42,540 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:56:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:42,968 INFO L93 Difference]: Finished difference Result 210 states and 230 transitions. [2021-11-23 02:56:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:56:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2021-11-23 02:56:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:42,970 INFO L225 Difference]: With dead ends: 210 [2021-11-23 02:56:42,970 INFO L226 Difference]: Without dead ends: 210 [2021-11-23 02:56:42,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:56:42,971 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 546 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:42,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 241 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:56:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-23 02:56:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 110. [2021-11-23 02:56:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 96 states have internal predecessors, (114), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-23 02:56:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2021-11-23 02:56:42,979 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 32 [2021-11-23 02:56:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:42,980 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2021-11-23 02:56:42,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:56:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2021-11-23 02:56:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:56:42,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:42,981 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:43,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:43,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:43,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:43,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:43,594 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:56:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:43,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1059338178, now seen corresponding path program 1 times [2021-11-23 02:56:43,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:43,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160998761] [2021-11-23 02:56:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:43,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:43,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:43,596 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:43,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 02:56:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:43,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:56:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:44,427 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 [2021-11-23 02:56:45,235 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 15 treesize of output 7 [2021-11-23 02:56:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:45,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:56:46,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:46,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160998761] [2021-11-23 02:56:46,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160998761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:46,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116454529] [2021-11-23 02:56:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:46,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:46,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:46,170 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:46,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-23 02:56:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:56:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:46,757 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 [2021-11-23 02:56:47,535 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 15 treesize of output 7 [2021-11-23 02:56:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:47,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:56:47,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116454529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:47,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880995026] [2021-11-23 02:56:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:47,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:47,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:47,760 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:47,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 02:56:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:56:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:48,425 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 [2021-11-23 02:56:49,288 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 15 treesize of output 7 [2021-11-23 02:56:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:49,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:56:50,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880995026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:50,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:56:50,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 12, 8, 14, 10] total 43 [2021-11-23 02:56:50,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77936930] [2021-11-23 02:56:50,419 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:56:50,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 02:56:50,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 02:56:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:56:50,422 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 36 states have internal predecessors, (85), 10 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-23 02:56:54,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:55,379 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2021-11-23 02:56:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:56:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 36 states have internal predecessors, (85), 10 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 32 [2021-11-23 02:56:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:55,382 INFO L225 Difference]: With dead ends: 118 [2021-11-23 02:56:55,382 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 02:56:55,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=373, Invalid=2707, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:56:55,385 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:55,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 448 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 1 Unknown, 137 Unchecked, 3.4s Time] [2021-11-23 02:56:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 02:56:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-11-23 02:56:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 97 states have internal predecessors, (114), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-23 02:56:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2021-11-23 02:56:55,393 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 32 [2021-11-23 02:56:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:55,393 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2021-11-23 02:56:55,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 36 states have internal predecessors, (85), 10 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-23 02:56:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2021-11-23 02:56:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 02:56:55,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:55,395 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:55,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:55,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-23 02:56:55,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-23 02:56:56,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:56,009 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:56:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1520254763, now seen corresponding path program 1 times [2021-11-23 02:56:56,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:56,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480567596] [2021-11-23 02:56:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:56,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:56,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:56,012 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:56,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 02:56:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:56,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:56:56,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:56,198 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 [2021-11-23 02:56:56,400 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 25 treesize of output 21 [2021-11-23 02:56:56,554 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 18 treesize of output 12 [2021-11-23 02:56:56,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-23 02:56:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:56,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:57,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:57,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480567596] [2021-11-23 02:56:57,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480567596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:57,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907885919] [2021-11-23 02:56:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:57,813 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:57,814 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:57,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 02:56:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:57,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:56:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:58,010 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 [2021-11-23 02:56:58,092 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 25 treesize of output 21 [2021-11-23 02:56:58,194 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 18 treesize of output 12 [2021-11-23 02:56:58,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-23 02:56:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:58,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:56:59,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907885919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:59,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689757802] [2021-11-23 02:56:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:59,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:59,113 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:59,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 02:56:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:59,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:56:59,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:59,563 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 [2021-11-23 02:56:59,861 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 25 treesize of output 21 [2021-11-23 02:57:00,174 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 19 treesize of output 13 [2021-11-23 02:57:00,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-23 02:57:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:57:00,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:57:06,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689757802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:06,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:57:06,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12, 9, 14, 11] total 32 [2021-11-23 02:57:06,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409983286] [2021-11-23 02:57:06,150 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:57:06,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:57:06,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:06,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:57:06,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=925, Unknown=2, NotChecked=0, Total=1056 [2021-11-23 02:57:06,152 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 33 states, 31 states have (on average 2.096774193548387) internal successors, (65), 27 states have internal predecessors, (65), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-23 02:57:08,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:57:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:10,631 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2021-11-23 02:57:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:57:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.096774193548387) internal successors, (65), 27 states have internal predecessors, (65), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 33 [2021-11-23 02:57:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:10,634 INFO L225 Difference]: With dead ends: 116 [2021-11-23 02:57:10,635 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 02:57:10,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 150 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=263, Invalid=1897, Unknown=2, NotChecked=0, Total=2162 [2021-11-23 02:57:10,637 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 114 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:10,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 292 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 511 Invalid, 0 Unknown, 94 Unchecked, 3.1s Time] [2021-11-23 02:57:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 02:57:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-11-23 02:57:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 98 states have internal predecessors, (114), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-23 02:57:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-11-23 02:57:10,647 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 33 [2021-11-23 02:57:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:10,647 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-11-23 02:57:10,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.096774193548387) internal successors, (65), 27 states have internal predecessors, (65), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-23 02:57:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-11-23 02:57:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:57:10,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:10,649 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:10,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:10,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:11,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:11,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:11,265 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:57:11,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:11,266 INFO L85 PathProgramCache]: Analyzing trace with hash 520579815, now seen corresponding path program 1 times [2021-11-23 02:57:11,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:11,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975906236] [2021-11-23 02:57:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:11,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:11,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:11,267 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:11,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 02:57:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:57:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:57:11,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:57:11,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975906236] [2021-11-23 02:57:11,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975906236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1798819124] [2021-11-23 02:57:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:11,857 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:11,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:57:11,858 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:57:11,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-23 02:57:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:57:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:57:12,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:57:12,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1798819124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263680142] [2021-11-23 02:57:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:12,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:12,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:12,266 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:57:12,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 02:57:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:57:12,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:57:12,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:57:13,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263680142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:13,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:57:13,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 17 [2021-11-23 02:57:13,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565442798] [2021-11-23 02:57:13,384 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:57:13,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:57:13,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:57:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:57:13,386 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 02:57:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:13,900 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-11-23 02:57:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:57:13,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 36 [2021-11-23 02:57:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:13,902 INFO L225 Difference]: With dead ends: 113 [2021-11-23 02:57:13,903 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 02:57:13,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:57:13,904 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 118 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:13,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 219 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:57:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 02:57:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2021-11-23 02:57:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 90 states have internal predecessors, (98), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-23 02:57:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-11-23 02:57:13,919 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 36 [2021-11-23 02:57:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:13,920 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-11-23 02:57:13,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 02:57:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-11-23 02:57:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:57:13,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:13,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:13,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-11-23 02:57:14,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:14,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-23 02:57:14,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:14,525 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:57:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2060951864, now seen corresponding path program 1 times [2021-11-23 02:57:14,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:14,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841144583] [2021-11-23 02:57:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:14,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:14,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:14,527 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:14,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 02:57:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:57:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:14,669 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 [2021-11-23 02:57:14,959 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:57:14,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-23 02:57:15,185 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 29 treesize of output 25 [2021-11-23 02:57:15,447 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:57:15,448 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 37 treesize of output 29 [2021-11-23 02:57:19,836 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 33 treesize of output 21 [2021-11-23 02:57:20,008 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 02:57:20,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-11-23 02:57:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:20,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:29,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:29,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841144583] [2021-11-23 02:57:29,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841144583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:29,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1725156541] [2021-11-23 02:57:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:29,875 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:29,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:57:29,879 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:57:29,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-23 02:57:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:57:30,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:30,063 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 [2021-11-23 02:57:30,319 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:57:30,319 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 22 treesize of output 22 [2021-11-23 02:57:30,589 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 20 treesize of output 16 [2021-11-23 02:57:30,939 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 19 treesize of output 17 [2021-11-23 02:57:33,458 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 16 treesize of output 8 [2021-11-23 02:57:33,576 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:57:33,577 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 21 treesize of output 26 [2021-11-23 02:57:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:33,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:36,213 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 27 treesize of output 23 [2021-11-23 02:57:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:36,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1725156541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810183595] [2021-11-23 02:57:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:36,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:36,947 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:57:36,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 02:57:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:57:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:37,033 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 [2021-11-23 02:57:37,171 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:57:37,171 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 21 treesize of output 21 [2021-11-23 02:57:37,228 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 20 treesize of output 16 [2021-11-23 02:57:39,539 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_72| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_72| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_72|) (_ bv0 32))))) is different from true [2021-11-23 02:57:39,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:57:39,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-11-23 02:57:40,089 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:57:40,090 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 20 treesize of output 25 [2021-11-23 02:57:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-23 02:57:40,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:40,922 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 31 treesize of output 27 [2021-11-23 02:57:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:57:42,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810183595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:42,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:57:42,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14, 13, 16, 16] total 51 [2021-11-23 02:57:42,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537725032] [2021-11-23 02:57:42,947 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:57:42,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 02:57:42,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 02:57:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2264, Unknown=6, NotChecked=98, Total=2652 [2021-11-23 02:57:42,951 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 45 states have internal predecessors, (114), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-23 02:57:57,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:58:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:14,729 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-11-23 02:58:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 02:58:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 45 states have internal predecessors, (114), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 38 [2021-11-23 02:58:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:14,732 INFO L225 Difference]: With dead ends: 127 [2021-11-23 02:58:14,732 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 02:58:14,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 157 SyntacticMatches, 19 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=603, Invalid=4499, Unknown=14, NotChecked=140, Total=5256 [2021-11-23 02:58:14,736 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 171 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:14,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 579 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 820 Invalid, 1 Unknown, 368 Unchecked, 4.9s Time] [2021-11-23 02:58:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 02:58:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2021-11-23 02:58:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 92 states have internal predecessors, (101), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-23 02:58:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2021-11-23 02:58:14,744 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 38 [2021-11-23 02:58:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:14,745 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2021-11-23 02:58:14,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 45 states have internal predecessors, (114), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-23 02:58:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2021-11-23 02:58:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:58:14,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:14,747 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:14,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:14,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:15,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:15,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:58:15,366 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:58:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash -752423482, now seen corresponding path program 1 times [2021-11-23 02:58:15,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:58:15,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469203921] [2021-11-23 02:58:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:15,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:58:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:58:15,368 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:58:15,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 02:58:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:58:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:58:15,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:58:15,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:58:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469203921] [2021-11-23 02:58:15,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469203921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1177746041] [2021-11-23 02:58:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:15,979 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:58:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:58:15,980 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:58:15,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-23 02:58:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:58:16,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:58:16,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:58:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1177746041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:16,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443870595] [2021-11-23 02:58:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:16,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:16,508 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:58:16,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-23 02:58:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:16,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:58:16,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:58:16,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:58:16,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443870595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:16,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:58:16,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4, 4, 4, 4] total 13 [2021-11-23 02:58:16,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114230124] [2021-11-23 02:58:16,913 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:58:16,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:58:16,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:58:16,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:58:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:58:16,915 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-23 02:58:17,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:17,870 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2021-11-23 02:58:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:58:17,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 40 [2021-11-23 02:58:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:17,873 INFO L225 Difference]: With dead ends: 141 [2021-11-23 02:58:17,873 INFO L226 Difference]: Without dead ends: 141 [2021-11-23 02:58:17,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:58:17,875 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 234 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:17,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 306 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:58:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-23 02:58:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2021-11-23 02:58:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 99 states have internal predecessors, (107), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-23 02:58:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-11-23 02:58:17,882 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 40 [2021-11-23 02:58:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:17,883 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-11-23 02:58:17,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-23 02:58:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-11-23 02:58:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:58:17,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:17,884 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-23 02:58:17,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:18,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:18,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:18,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:18,494 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 02:58:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:18,495 INFO L85 PathProgramCache]: Analyzing trace with hash 594821051, now seen corresponding path program 1 times [2021-11-23 02:58:18,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:58:18,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162451184] [2021-11-23 02:58:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:18,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:58:18,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:58:18,497 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:58:18,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 02:58:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:58:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:19,215 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 37 treesize of output 33 [2021-11-23 02:58:19,514 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:58:19,514 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 35 treesize of output 27 [2021-11-23 02:58:24,009 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 [2021-11-23 02:58:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:58:28,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:40,436 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_78| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19| (Array (_ BitVec 32) (_ BitVec 1)))) (or (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19| (store (store |c_#valid| |c_ldv_malloc_#res.base| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_78| (_ bv0 1))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret40#1.base_261| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_261|)))) (not (= (store (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_261| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_78| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19|)))))) is different from false [2021-11-23 02:58:40,591 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_443| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_78| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19| (Array (_ BitVec 32) (_ BitVec 1)))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~ret40#1.base_261| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_261|)))) (not (= (store (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_261| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_78| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19|)))) (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_19| (store (store |c_#valid| |v_ldv_malloc_#res.base_443| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_78| (_ bv0 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_443|)))))) is different from false [2021-11-23 02:59:01,552 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_20| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_#t~ret40#1.base_261| (_ BitVec 32)) (|v_ldv_malloc_#res.base_447| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_447| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_447|)))) (not (= (_ bv0 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret40#1.base_261|))))) (= (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret40#1.base_261| (_ bv0 1)) |v_ldv_malloc_#res.base_447| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_20|) (exists ((|v_ULTIMATE.start_entry_point_#t~ret38#1.base_156| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret40#1.base_261| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_156| (_ bv1 1)))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_156|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_#t~ret40#1.base_261|))))))))) (not (= (store (store .cse1 |v_ULTIMATE.start_entry_point_#t~ret40#1.base_261| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret38#1.base_156| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_20|)))))))) is different from false [2021-11-23 02:59:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 02:59:01,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:59:01,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162451184] [2021-11-23 02:59:01,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162451184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:59:01,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [174978091] [2021-11-23 02:59:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:01,776 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:59:01,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:59:01,777 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:59:01,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-23 02:59:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:01,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 02:59:01,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:59:08,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 38 treesize of output 34 [2021-11-23 02:59:08,875 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 02:59:08,876 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 49 treesize of output 39 [2021-11-23 02:59:15,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-11-23 02:59:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:59:19,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:59:25,107 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 21 treesize of output 19 [2021-11-23 02:59:32,318 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25| (Array (_ BitVec 32) (_ BitVec 1)))) (let ((.cse1 (store |c_#valid| |c_ldv_malloc_#res.base| (_ bv0 1)))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ bv0 1)))) (and (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82|))))))))))))) (_ bv1 1))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 32))) (not (= (store .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269|)))))))))))) (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25| (store .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 1))) (and (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 32))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82|)))))))))) (_ bv1 1)))))))) is different from false [2021-11-23 02:59:35,109 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ BitVec 32)) (|v_ldv_malloc_#res.base_455| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25| (Array (_ BitVec 32) (_ BitVec 1)))) (let ((.cse1 (store |c_#valid| |v_ldv_malloc_#res.base_455| (_ bv0 1)))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ bv0 1)))) (and (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82|))))))))))))) (_ bv1 1))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 32))) (not (= (store .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269|)))))))))))) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_455|)))))) (_ bv0 1))) (= (store .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25|) (and (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 32))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82|)))))))))))) (_ bv1 1)))))))) is different from false [2021-11-23 02:59:37,231 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ BitVec 32)) (|v_ldv_malloc_#res.base_455| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25| (Array (_ BitVec 32) (_ BitVec 1)))) (let ((.cse1 (store |c_#valid| |v_ldv_malloc_#res.base_455| (_ bv0 1)))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ bv0 1)))) (and (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82|))))))))))))) (_ bv1 1))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 32))) (not (= (store .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269|)))))))))))) (= (store .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_25|) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_455|))))))))) (and (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82| (_ bv0 32))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_82|)))))))))))) (_ bv1 1)))))))) is different from false [2021-11-23 02:59:59,080 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_459| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_26| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_ldv_malloc_#res.base_459| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_459|)))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret38#1.base_161| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_161| (_ bv1 1)))) (and (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_26| (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret38#1.base_161| (_ bv0 1)))) (not (= |v_ULTIMATE.start_entry_point_#t~ret38#1.base_161| (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269|))))))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_161|))))))))) (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_26| (store (store .cse1 |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269| (_ bv0 1)) |v_ldv_malloc_#res.base_459| (_ bv0 1))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_#t~ret40#1.base_269|))))))) (= |v_ldv_malloc_#res.base_459| (_ bv0 32))))) is different from false [2021-11-23 02:59:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 02:59:59,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [174978091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:59:59,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68224766] [2021-11-23 02:59:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:59,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:59:59,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:59:59,320 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:59:59,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e2b88d9-75de-41dc-95a4-87ef58d98d71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-23 02:59:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:59,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 02:59:59,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:00:03,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-23 03:00:04,328 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 03:00:04,328 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 39 treesize of output 31 [2021-11-23 03:00:09,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:00:09,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-11-23 03:00:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:00:20,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:00:31,414 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 21 treesize of output 19 [2021-11-23 03:00:44,970 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_467| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_31| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_86| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_ldv_malloc_#res.base_467| (_ bv0 1)))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~ret40#1.base_277| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_277| (_ bv0 1)))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_277|))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_86|)))))))))) (_ bv1 1))) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_86| (_ bv0 32))) (not (= (store .cse0 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_86| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_31|))))) (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_31| (store .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_86| (_ bv0 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_467|)))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_86|))))))))) (_ bv1 1)))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_86| (_ bv0 32))))))) is different from false