./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.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_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/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_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/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_2e6eeff7-183b-43b5-8956-4be6bcf21e00/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 cac2372de612a50e6cea0e2672ab51101a6ffa3bb2603a06b5c5aa59090db116 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:50:47,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:50:47,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:50:47,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:50:47,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:50:47,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:50:47,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:50:47,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:50:47,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:50:47,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:50:47,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:50:47,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:50:47,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:50:47,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:50:47,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:50:47,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:50:47,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:50:47,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:50:47,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:50:47,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:50:47,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:50:47,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:50:47,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:50:47,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:50:47,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:50:47,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:50:47,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:50:47,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:50:47,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:50:47,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:50:47,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:50:47,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:50:47,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:50:47,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:50:47,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:50:47,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:50:47,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:50:47,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:50:47,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:50:47,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:50:47,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:50:47,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:50:47,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:50:47,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:50:47,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:50:47,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:50:47,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:50:47,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:50:47,640 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:50:47,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:50:47,641 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:50:47,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:50:47,641 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:50:47,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:50:47,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:50:47,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:50:47,642 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:50:47,642 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:50:47,643 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:50:47,643 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:50:47,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:50:47,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:50:47,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:50:47,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:50:47,644 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:50:47,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:50:47,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:50:47,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:50:47,645 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:50:47,646 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:50:47,646 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:50:47,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:50:47,646 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:50:47,646 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:50:47,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:50:47,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:50:47,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:50:47,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:47,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:50:47,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:50:47,648 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:50:47,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:50:47,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:50:47,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:50:47,649 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_2e6eeff7-183b-43b5-8956-4be6bcf21e00/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cac2372de612a50e6cea0e2672ab51101a6ffa3bb2603a06b5c5aa59090db116 [2021-11-23 03:50:47,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:50:47,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:50:47,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:50:47,965 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:50:47,966 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:50:47,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i [2021-11-23 03:50:48,033 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data/f2962da9e/1e96bd3e83fa47948867f1b15dac0885/FLAGad448dbd1 [2021-11-23 03:50:48,579 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:50:48,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i [2021-11-23 03:50:48,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data/f2962da9e/1e96bd3e83fa47948867f1b15dac0885/FLAGad448dbd1 [2021-11-23 03:50:48,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data/f2962da9e/1e96bd3e83fa47948867f1b15dac0885 [2021-11-23 03:50:48,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:50:48,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:50:48,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:48,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:50:48,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:50:48,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:48" (1/1) ... [2021-11-23 03:50:48,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aad0178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:48, skipping insertion in model container [2021-11-23 03:50:48,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:48" (1/1) ... [2021-11-23 03:50:48,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:50:48,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:50:49,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:49,498 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 03:50:49,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c86eec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:49, skipping insertion in model container [2021-11-23 03:50:49,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:49,500 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 03:50:49,503 INFO L158 Benchmark]: Toolchain (without parser) took 608.64ms. Allocated memory is still 127.9MB. Free memory was 84.4MB in the beginning and 96.7MB in the end (delta: -12.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:50:49,504 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 127.9MB. Free memory is still 102.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:50:49,506 INFO L158 Benchmark]: CACSL2BoogieTranslator took 603.85ms. Allocated memory is still 127.9MB. Free memory was 84.2MB in the beginning and 96.7MB in the end (delta: -12.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:50:49,507 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 127.9MB. Free memory is still 102.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 603.85ms. Allocated memory is still 127.9MB. Free memory was 84.2MB in the beginning and 96.7MB in the end (delta: -12.5MB). Peak memory consumption was 10.5MB. 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_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/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_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/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_2e6eeff7-183b-43b5-8956-4be6bcf21e00/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 cac2372de612a50e6cea0e2672ab51101a6ffa3bb2603a06b5c5aa59090db116 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:50:51,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:50:51,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:50:51,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:50:51,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:50:51,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:50:51,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:50:51,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:50:51,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:50:51,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:50:51,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:50:51,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:50:51,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:50:51,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:50:51,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:50:51,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:50:51,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:50:51,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:50:51,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:50:51,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:50:51,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:50:51,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:50:51,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:50:51,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:50:51,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:50:51,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:50:51,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:50:51,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:50:51,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:50:51,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:50:51,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:50:51,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:50:51,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:50:51,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:50:51,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:50:51,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:50:51,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:50:51,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:50:51,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:50:51,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:50:51,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:50:51,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 03:50:51,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:50:51,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:50:51,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:50:51,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:50:51,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:50:51,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:50:51,956 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:50:51,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:50:51,957 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:50:51,957 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:50:51,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:50:51,959 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:50:51,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:50:51,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:50:51,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:50:51,961 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:50:51,961 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:50:51,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:50:51,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:50:51,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:50:51,962 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:50:51,962 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:50:51,963 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:50:51,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:50:51,963 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:50:51,963 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:50:51,964 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:50:51,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:50:51,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:50:51,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:50:51,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:50:51,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:50:51,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:51,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:50:51,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:50:51,966 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:50:51,966 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:50:51,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:50:51,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:50:51,967 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_2e6eeff7-183b-43b5-8956-4be6bcf21e00/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cac2372de612a50e6cea0e2672ab51101a6ffa3bb2603a06b5c5aa59090db116 [2021-11-23 03:50:52,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:50:52,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:50:52,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:50:52,377 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:50:52,378 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:50:52,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i [2021-11-23 03:50:52,459 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data/a5d862983/15d763de62084f6087297f7bb68c24b5/FLAG29a5ec079 [2021-11-23 03:50:53,092 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:50:53,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i [2021-11-23 03:50:53,110 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data/a5d862983/15d763de62084f6087297f7bb68c24b5/FLAG29a5ec079 [2021-11-23 03:50:53,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/data/a5d862983/15d763de62084f6087297f7bb68c24b5 [2021-11-23 03:50:53,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:50:53,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:50:53,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:53,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:50:53,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:50:53,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:53" (1/1) ... [2021-11-23 03:50:53,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6637ba3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:53, skipping insertion in model container [2021-11-23 03:50:53,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:53" (1/1) ... [2021-11-23 03:50:53,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:50:53,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:50:53,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:53,909 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 03:50:53,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:50:53,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:53,970 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:50:54,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:54,107 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:50:54,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54 WrapperNode [2021-11-23 03:50:54,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:54,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:50:54,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:50:54,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:50:54,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,221 INFO L137 Inliner]: procedures = 167, calls = 73, calls flagged for inlining = 25, calls inlined = 19, statements flattened = 124 [2021-11-23 03:50:54,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:50:54,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:50:54,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:50:54,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:50:54,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:50:54,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:50:54,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:50:54,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:50:54,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (1/1) ... [2021-11-23 03:50:54,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:54,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:50:54,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:50:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 03:50:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-11-23 03:50:54,380 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-11-23 03:50:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:50:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:50:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_put [2021-11-23 03:50:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_put [2021-11-23 03:50:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:50:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:50:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:50:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:50:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 03:50:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:50:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:50:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:50:54,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:50:54,605 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:50:54,622 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:50:55,103 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:50:55,110 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:50:55,113 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:50:55,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:55 BoogieIcfgContainer [2021-11-23 03:50:55,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:50:55,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:50:55,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:50:55,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:50:55,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:50:53" (1/3) ... [2021-11-23 03:50:55,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adcfcae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:50:55, skipping insertion in model container [2021-11-23 03:50:55,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:54" (2/3) ... [2021-11-23 03:50:55,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adcfcae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:50:55, skipping insertion in model container [2021-11-23 03:50:55,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:55" (3/3) ... [2021-11-23 03:50:55,130 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test22_3-1.i [2021-11-23 03:50:55,136 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:50:55,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-23 03:50:55,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:50:55,214 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 03:50:55,217 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-23 03:50:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 59 states have (on average 1.576271186440678) internal successors, (93), 85 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:50:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:50:55,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:55,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:55,247 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:50:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash 886333963, now seen corresponding path program 1 times [2021-11-23 03:50:55,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:55,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569664616] [2021-11-23 03:50:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:55,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:55,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:55,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:55,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:50:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:55,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:50:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:55,458 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 03:50:55,540 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 03:50:55,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:55,641 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 03:50:55,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:55,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569664616] [2021-11-23 03:50:55,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569664616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:55,644 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:55,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 03:50:55,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907645515] [2021-11-23 03:50:55,646 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:55,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:55,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:55,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:55,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:50:55,698 INFO L87 Difference]: Start difference. First operand has 92 states, 59 states have (on average 1.576271186440678) internal successors, (93), 85 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 03:50:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:56,198 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2021-11-23 03:50:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:50:56,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2021-11-23 03:50:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:56,211 INFO L225 Difference]: With dead ends: 158 [2021-11-23 03:50:56,211 INFO L226 Difference]: Without dead ends: 156 [2021-11-23 03:50:56,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:56,216 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 97 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:56,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 387 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:50:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-23 03:50:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 95. [2021-11-23 03:50:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 87 states have internal predecessors, (96), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:50:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-11-23 03:50:56,265 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 10 [2021-11-23 03:50:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:56,265 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-11-23 03:50:56,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 03:50:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-11-23 03:50:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:50:56,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:56,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:56,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 03:50:56,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:56,479 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:50:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash 914963114, now seen corresponding path program 1 times [2021-11-23 03:50:56,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:56,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908345030] [2021-11-23 03:50:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:56,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:56,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:56,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:56,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:50:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:50:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:56,659 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 03:50:56,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:56,726 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 03:50:56,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:56,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908345030] [2021-11-23 03:50:56,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908345030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:56,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:56,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 03:50:56,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410321313] [2021-11-23 03:50:56,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:56,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:50:56,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:50:56,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:56,731 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 03:50:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:56,772 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2021-11-23 03:50:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2021-11-23 03:50:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:56,775 INFO L225 Difference]: With dead ends: 114 [2021-11-23 03:50:56,775 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 03:50:56,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 03:50:56,777 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 19 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:56,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 394 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 03:50:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2021-11-23 03:50:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 85 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:50:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-11-23 03:50:56,790 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 10 [2021-11-23 03:50:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:56,790 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-11-23 03:50:56,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 03:50:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-11-23 03:50:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:50:56,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:56,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:56,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:57,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:57,011 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:50:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1706549126, now seen corresponding path program 1 times [2021-11-23 03:50:57,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:57,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462960078] [2021-11-23 03:50:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:57,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:57,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:57,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:57,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 03:50:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:50:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:57,125 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 03:50:57,245 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 03:50:57,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:57,771 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 03:50:57,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:57,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462960078] [2021-11-23 03:50:57,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462960078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:57,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:57,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-23 03:50:57,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151519699] [2021-11-23 03:50:57,772 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:57,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:50:57,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:50:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:50:57,775 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:50:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:58,806 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-11-23 03:50:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:50:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 11 [2021-11-23 03:50:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:58,826 INFO L225 Difference]: With dead ends: 134 [2021-11-23 03:50:58,827 INFO L226 Difference]: Without dead ends: 134 [2021-11-23 03:50:58,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:50:58,829 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 109 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:58,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 736 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:50:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-23 03:50:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2021-11-23 03:50:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 84 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:50:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-11-23 03:50:58,841 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 11 [2021-11-23 03:50:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:58,842 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-11-23 03:50:58,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:50:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-11-23 03:50:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:50:58,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:58,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:58,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:59,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:59,054 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:50:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:59,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1363388625, now seen corresponding path program 1 times [2021-11-23 03:50:59,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:59,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766722373] [2021-11-23 03:50:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:59,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:59,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:59,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:59,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 03:50:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:59,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:50:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:59,193 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 03:50:59,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:59,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:59,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766722373] [2021-11-23 03:50:59,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766722373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:59,240 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:59,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 03:50:59,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366296719] [2021-11-23 03:50:59,240 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:59,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:50:59,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:59,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:50:59,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:59,242 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 03:50:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:59,266 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2021-11-23 03:50:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2021-11-23 03:50:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:59,268 INFO L225 Difference]: With dead ends: 113 [2021-11-23 03:50:59,268 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 03:50:59,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 03:50:59,276 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 35 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:59,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 424 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 03:50:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2021-11-23 03:50:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 84 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:50:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-11-23 03:50:59,302 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 12 [2021-11-23 03:50:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:59,302 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-11-23 03:50:59,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 03:50:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-11-23 03:50:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:50:59,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:59,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:59,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:59,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:59,520 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:50:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:59,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1188768336, now seen corresponding path program 1 times [2021-11-23 03:50:59,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:59,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097647825] [2021-11-23 03:50:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:59,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:59,525 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:59,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:50:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:50:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:59,638 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 03:50:59,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:59,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:59,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097647825] [2021-11-23 03:50:59,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097647825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:59,670 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:59,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 03:50:59,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18821771] [2021-11-23 03:50:59,671 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:59,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:50:59,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:50:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:50:59,672 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 03:50:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:59,711 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-11-23 03:50:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:59,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2021-11-23 03:50:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:59,713 INFO L225 Difference]: With dead ends: 112 [2021-11-23 03:50:59,713 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 03:50:59,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:59,714 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 21 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:59,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 288 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 03:50:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-11-23 03:50:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 86 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:50:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-11-23 03:50:59,723 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 12 [2021-11-23 03:50:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:59,724 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-11-23 03:50:59,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 03:50:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-11-23 03:50:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:50:59,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:59,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:59,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:59,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:59,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:50:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash 86428473, now seen corresponding path program 1 times [2021-11-23 03:50:59,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:59,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258526573] [2021-11-23 03:50:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:59,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:59,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:59,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:59,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 03:51:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:51:00,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:00,050 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 03:51:00,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:00,092 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 03:51:00,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:00,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258526573] [2021-11-23 03:51:00,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258526573] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:00,093 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:00,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 03:51:00,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121456570] [2021-11-23 03:51:00,094 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:00,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:51:00,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:51:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:51:00,097 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 03:51:00,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:00,144 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-23 03:51:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:51:00,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 16 [2021-11-23 03:51:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:00,146 INFO L225 Difference]: With dead ends: 105 [2021-11-23 03:51:00,146 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 03:51:00,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:51:00,147 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 66 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:00,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 239 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:51:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 03:51:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2021-11-23 03:51:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 88 states have internal predecessors, (95), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:51:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-11-23 03:51:00,156 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 16 [2021-11-23 03:51:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:00,156 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-11-23 03:51:00,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 03:51:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-11-23 03:51:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:51:00,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:00,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:00,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:00,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:00,376 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:00,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1276371002, now seen corresponding path program 1 times [2021-11-23 03:51:00,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:00,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697645993] [2021-11-23 03:51:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:00,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:00,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:00,378 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:00,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 03:51:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:00,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:51:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:00,571 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 03:51:00,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:00,673 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 03:51:00,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:00,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697645993] [2021-11-23 03:51:00,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697645993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:00,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:00,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-23 03:51:00,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141917452] [2021-11-23 03:51:00,674 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:00,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:51:00,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:51:00,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:51:00,676 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:51:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:00,779 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-11-23 03:51:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:51:00,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-23 03:51:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:00,781 INFO L225 Difference]: With dead ends: 111 [2021-11-23 03:51:00,781 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 03:51:00,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:51:00,782 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 21 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:00,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 553 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:51:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 03:51:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2021-11-23 03:51:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 96 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:51:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-11-23 03:51:00,790 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 18 [2021-11-23 03:51:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:00,791 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-11-23 03:51:00,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:51:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-11-23 03:51:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:51:00,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:00,792 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:00,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:01,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:01,004 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash -442908135, now seen corresponding path program 1 times [2021-11-23 03:51:01,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:01,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038835595] [2021-11-23 03:51:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:01,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:01,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:01,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 03:51:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:01,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:01,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:01,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038835595] [2021-11-23 03:51:01,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038835595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:01,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1568172923] [2021-11-23 03:51:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:01,309 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:01,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:01,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:01,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 03:51:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:01,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:01,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1568172923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:01,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153506938] [2021-11-23 03:51:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:01,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:01,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:01,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:01,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:51:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:51:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:01,629 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 03:51:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:01,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:01,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153506938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:01,949 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:01,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 16 [2021-11-23 03:51:01,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539674403] [2021-11-23 03:51:01,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:01,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:51:01,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:51:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:51:01,950 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 03:51:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:02,401 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-11-23 03:51:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:51:02,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 18 [2021-11-23 03:51:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:02,403 INFO L225 Difference]: With dead ends: 140 [2021-11-23 03:51:02,403 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 03:51:02,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:51:02,404 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 95 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:02,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 537 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:51:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 03:51:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2021-11-23 03:51:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 95 states have internal predecessors, (101), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:51:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2021-11-23 03:51:02,412 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 18 [2021-11-23 03:51:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:02,412 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2021-11-23 03:51:02,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 03:51:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2021-11-23 03:51:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:51:02,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:02,413 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:02,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:02,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:02,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:03,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:03,014 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash -442908134, now seen corresponding path program 1 times [2021-11-23 03:51:03,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:03,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084911347] [2021-11-23 03:51:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:03,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:03,016 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:03,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 03:51:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:03,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:03,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:03,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:03,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084911347] [2021-11-23 03:51:03,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084911347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:03,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2011154711] [2021-11-23 03:51:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:03,277 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:03,278 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:03,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 03:51:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:03,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:03,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2011154711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:03,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360563227] [2021-11-23 03:51:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:03,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:03,517 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:03,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:51:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 03:51:03,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:03,620 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 03:51:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:03,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:04,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360563227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:04,787 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:04,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6, 6, 6] total 24 [2021-11-23 03:51:04,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951893058] [2021-11-23 03:51:04,788 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:04,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:51:04,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:04,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:51:04,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:51:04,789 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:51:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:06,051 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2021-11-23 03:51:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:51:06,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-23 03:51:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:06,056 INFO L225 Difference]: With dead ends: 152 [2021-11-23 03:51:06,056 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 03:51:06,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:51:06,058 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 169 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:06,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 857 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:51:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 03:51:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2021-11-23 03:51:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 94 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:51:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2021-11-23 03:51:06,065 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 18 [2021-11-23 03:51:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:06,065 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2021-11-23 03:51:06,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:51:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2021-11-23 03:51:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:51:06,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:06,067 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:06,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:06,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-23 03:51:06,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:06,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:06,669 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash -434462503, now seen corresponding path program 1 times [2021-11-23 03:51:06,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:06,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507244712] [2021-11-23 03:51:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:06,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:06,672 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:06,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 03:51:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:06,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:06,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507244712] [2021-11-23 03:51:06,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507244712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:06,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [903865806] [2021-11-23 03:51:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:06,938 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:06,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:06,941 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:06,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 03:51:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:51:07,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:07,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:07,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [903865806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:07,206 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:51:07,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 14 [2021-11-23 03:51:07,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274617320] [2021-11-23 03:51:07,207 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:07,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:51:07,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:07,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:51:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:51:07,208 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 03:51:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:07,264 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-11-23 03:51:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:51:07,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 20 [2021-11-23 03:51:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:07,266 INFO L225 Difference]: With dead ends: 107 [2021-11-23 03:51:07,266 INFO L226 Difference]: Without dead ends: 107 [2021-11-23 03:51:07,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:51:07,267 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 53 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:07,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 442 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:51:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-23 03:51:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-11-23 03:51:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.375) internal successors, (99), 94 states have internal predecessors, (99), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:51:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2021-11-23 03:51:07,275 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 20 [2021-11-23 03:51:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:07,276 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2021-11-23 03:51:07,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 03:51:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2021-11-23 03:51:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:51:07,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:07,279 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:07,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-23 03:51:07,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:07,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:07,681 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash 542131140, now seen corresponding path program 1 times [2021-11-23 03:51:07,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:07,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345621882] [2021-11-23 03:51:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:07,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:07,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:07,683 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:07,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 03:51:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:07,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:07,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:07,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345621882] [2021-11-23 03:51:07,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345621882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:07,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845335992] [2021-11-23 03:51:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:07,979 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:07,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:07,980 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:07,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 03:51:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:08,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:08,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:08,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:08,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845335992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:08,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601540936] [2021-11-23 03:51:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:08,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:08,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:08,228 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:08,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 03:51:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:08,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:51:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:08,315 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 03:51:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:08,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:08,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601540936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:08,649 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:08,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6, 6, 6] total 17 [2021-11-23 03:51:08,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575235782] [2021-11-23 03:51:08,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:08,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:51:08,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:08,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:51:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:51:08,651 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:51:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:09,072 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2021-11-23 03:51:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:51:09,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-23 03:51:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:09,074 INFO L225 Difference]: With dead ends: 102 [2021-11-23 03:51:09,074 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 03:51:09,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 105 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:51:09,075 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:09,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 463 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:51:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 03:51:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-23 03:51:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 92 states have internal predecessors, (97), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:51:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-11-23 03:51:09,081 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 22 [2021-11-23 03:51:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:09,081 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-11-23 03:51:09,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:51:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-11-23 03:51:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:51:09,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:09,083 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:09,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-23 03:51:09,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-23 03:51:09,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:09,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:09,685 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash 542131141, now seen corresponding path program 1 times [2021-11-23 03:51:09,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400506611] [2021-11-23 03:51:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:09,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:09,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:09,687 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:09,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 03:51:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:09,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:09,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:09,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:09,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400506611] [2021-11-23 03:51:09,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400506611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:09,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1353161454] [2021-11-23 03:51:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:09,971 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:09,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:09,977 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:09,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 03:51:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:10,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:10,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:10,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1353161454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:10,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509899639] [2021-11-23 03:51:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:10,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:10,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:10,225 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:10,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 03:51:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 03:51:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:10,339 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 03:51:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:10,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:11,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509899639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:11,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:11,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [6, 6, 6, 6] total 26 [2021-11-23 03:51:11,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513667051] [2021-11-23 03:51:11,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:11,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:51:11,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:11,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:51:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:51:11,743 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:51:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:12,884 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2021-11-23 03:51:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:51:12,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-23 03:51:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:12,886 INFO L225 Difference]: With dead ends: 103 [2021-11-23 03:51:12,886 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 03:51:12,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:51:12,887 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 116 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:12,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 908 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:51:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 03:51:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-11-23 03:51:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 90 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:51:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-11-23 03:51:12,892 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 22 [2021-11-23 03:51:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:12,892 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-11-23 03:51:12,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:51:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-11-23 03:51:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:51:12,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:12,893 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:12,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:13,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:13,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:13,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:13,494 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:13,495 INFO L85 PathProgramCache]: Analyzing trace with hash 491421061, now seen corresponding path program 1 times [2021-11-23 03:51:13,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127689883] [2021-11-23 03:51:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:13,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:13,496 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:13,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 03:51:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:13,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:13,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:13,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:13,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127689883] [2021-11-23 03:51:13,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127689883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1949710280] [2021-11-23 03:51:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:13,762 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:13,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:13,764 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:13,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 03:51:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:51:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:13,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:14,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1949710280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:14,013 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:51:14,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 15 [2021-11-23 03:51:14,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396437377] [2021-11-23 03:51:14,013 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:14,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:51:14,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:51:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:51:14,015 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 03:51:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:14,078 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-11-23 03:51:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:51:14,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 22 [2021-11-23 03:51:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:14,080 INFO L225 Difference]: With dead ends: 103 [2021-11-23 03:51:14,080 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 03:51:14,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:51:14,081 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 75 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:14,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 486 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:51:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 03:51:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-11-23 03:51:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 89 states have internal predecessors, (94), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:51:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-11-23 03:51:14,086 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 22 [2021-11-23 03:51:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:14,087 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-11-23 03:51:14,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 03:51:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-11-23 03:51:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:51:14,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:14,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:14,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:14,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:14,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:14,497 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1184735654, now seen corresponding path program 1 times [2021-11-23 03:51:14,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:14,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15382815] [2021-11-23 03:51:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:14,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:14,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:14,499 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:14,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 03:51:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:14,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:51:14,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:14,620 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 03:51:14,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:14,712 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 03:51:14,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:14,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15382815] [2021-11-23 03:51:14,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15382815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:14,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:14,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 03:51:14,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48143960] [2021-11-23 03:51:14,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:14,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:51:14,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:51:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:51:14,714 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:51:14,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:14,831 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-23 03:51:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:51:14,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2021-11-23 03:51:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:14,833 INFO L225 Difference]: With dead ends: 106 [2021-11-23 03:51:14,833 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 03:51:14,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 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 03:51:14,834 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 27 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:14,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 177 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:51:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 03:51:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-11-23 03:51:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.35) internal successors, (81), 76 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:51:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-11-23 03:51:14,839 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 27 [2021-11-23 03:51:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:14,839 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-11-23 03:51:14,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:51:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-11-23 03:51:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:51:14,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:14,840 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:14,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:15,051 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash 764352482, now seen corresponding path program 1 times [2021-11-23 03:51:15,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:15,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906768936] [2021-11-23 03:51:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:15,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:15,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:15,056 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:15,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 03:51:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:15,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:15,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:15,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:15,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906768936] [2021-11-23 03:51:15,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906768936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:15,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [274562746] [2021-11-23 03:51:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:15,341 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:15,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:15,341 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:15,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 03:51:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:15,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:15,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [274562746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947405178] [2021-11-23 03:51:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:15,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:15,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:15,599 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:15,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 03:51:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 03:51:15,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:15,675 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 03:51:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:15,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:16,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947405178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:16,069 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:16,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [6, 6, 6, 6] total 17 [2021-11-23 03:51:16,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741907722] [2021-11-23 03:51:16,070 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:16,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:51:16,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:16,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:51:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:51:16,071 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:16,316 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-11-23 03:51:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:51:16,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-23 03:51:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:16,318 INFO L225 Difference]: With dead ends: 86 [2021-11-23 03:51:16,318 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 03:51:16,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:51:16,319 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 66 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:16,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 241 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-11-23 03:51:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 03:51:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-11-23 03:51:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 74 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:51:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-11-23 03:51:16,323 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 30 [2021-11-23 03:51:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:16,324 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-11-23 03:51:16,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-11-23 03:51:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:51:16,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:16,325 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:16,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-23 03:51:16,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-23 03:51:16,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:16,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:16,933 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:16,933 INFO L85 PathProgramCache]: Analyzing trace with hash 764352483, now seen corresponding path program 1 times [2021-11-23 03:51:16,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:16,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073516933] [2021-11-23 03:51:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:16,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:16,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:16,937 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:16,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 03:51:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:17,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:17,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073516933] [2021-11-23 03:51:17,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073516933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [565749184] [2021-11-23 03:51:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:17,196 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:17,197 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:17,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 03:51:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:17,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:17,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [565749184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:17,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416959912] [2021-11-23 03:51:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:17,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:17,439 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:17,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 03:51:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 03:51:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:17,545 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 03:51:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:17,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:18,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416959912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:18,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:18,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [6, 6, 6, 6] total 25 [2021-11-23 03:51:18,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848957250] [2021-11-23 03:51:18,691 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:18,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:51:18,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:51:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:51:18,693 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (3), 2 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 03:51:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:19,585 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-11-23 03:51:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:51:19,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (3), 2 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 30 [2021-11-23 03:51:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:19,587 INFO L225 Difference]: With dead ends: 89 [2021-11-23 03:51:19,587 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 03:51:19,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:51:19,588 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 86 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:19,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 649 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 255 Invalid, 0 Unknown, 17 Unchecked, 0.7s Time] [2021-11-23 03:51:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 03:51:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-11-23 03:51:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:51:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-11-23 03:51:19,592 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 30 [2021-11-23 03:51:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:19,593 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-11-23 03:51:19,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (3), 2 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 03:51:19,593 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-11-23 03:51:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 03:51:19,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:19,593 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:19,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:19,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-23 03:51:20,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:20,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:20,205 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:20,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:20,206 INFO L85 PathProgramCache]: Analyzing trace with hash -113494804, now seen corresponding path program 1 times [2021-11-23 03:51:20,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:20,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084289992] [2021-11-23 03:51:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:20,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:20,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:20,208 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:20,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 03:51:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:20,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:20,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:20,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084289992] [2021-11-23 03:51:20,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084289992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1841791233] [2021-11-23 03:51:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:20,581 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:20,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:20,585 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:20,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-23 03:51:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:51:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:20,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:20,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1841791233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:20,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:51:20,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 15 [2021-11-23 03:51:20,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977778111] [2021-11-23 03:51:20,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:20,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:51:20,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:51:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:51:20,891 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:51:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:20,950 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-11-23 03:51:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:51:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-11-23 03:51:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:20,951 INFO L225 Difference]: With dead ends: 80 [2021-11-23 03:51:20,951 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 03:51:20,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:51:20,952 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 42 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:20,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 395 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:51:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 03:51:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-23 03:51:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:51:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-11-23 03:51:20,957 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 36 [2021-11-23 03:51:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:20,957 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-11-23 03:51:20,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:51:20,957 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-11-23 03:51:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 03:51:20,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:20,958 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:20,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:21,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:21,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:21,360 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:21,361 INFO L85 PathProgramCache]: Analyzing trace with hash -97542190, now seen corresponding path program 1 times [2021-11-23 03:51:21,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:21,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105442811] [2021-11-23 03:51:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:21,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:21,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:21,362 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:21,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 03:51:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:21,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:21,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:21,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:21,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105442811] [2021-11-23 03:51:21,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105442811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:21,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1407888410] [2021-11-23 03:51:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:21,669 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:21,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:21,670 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:21,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-23 03:51:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:21,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:21,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:21,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1407888410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:21,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645005091] [2021-11-23 03:51:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:21,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:21,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:21,973 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:21,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 03:51:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:22,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:51:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:22,057 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 03:51:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:22,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:22,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645005091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:22,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:22,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [6, 6, 6, 6] total 20 [2021-11-23 03:51:22,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014596920] [2021-11-23 03:51:22,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:22,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:51:22,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:51:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:51:22,632 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:23,078 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-11-23 03:51:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:51:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-11-23 03:51:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:23,080 INFO L225 Difference]: With dead ends: 108 [2021-11-23 03:51:23,080 INFO L226 Difference]: Without dead ends: 108 [2021-11-23 03:51:23,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:51:23,081 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 117 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:23,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 369 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 226 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2021-11-23 03:51:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-23 03:51:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2021-11-23 03:51:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 83 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:51:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-11-23 03:51:23,086 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 42 [2021-11-23 03:51:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:23,086 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-11-23 03:51:23,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-11-23 03:51:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 03:51:23,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:23,087 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:23,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:23,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-23 03:51:23,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-23 03:51:23,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:23,690 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_kobject_putErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:23,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash -97542189, now seen corresponding path program 1 times [2021-11-23 03:51:23,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:23,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875560536] [2021-11-23 03:51:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:23,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:23,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:23,693 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:23,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 03:51:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:23,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:24,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:24,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875560536] [2021-11-23 03:51:24,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875560536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:24,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1336397105] [2021-11-23 03:51:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:24,018 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:24,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:24,018 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:24,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 03:51:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:24,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:24,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:24,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:24,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1336397105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:24,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378956824] [2021-11-23 03:51:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:24,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:24,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:24,337 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:24,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 03:51:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 03:51:24,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:24,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:51:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:24,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:26,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378956824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:26,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:26,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [6, 6, 6, 6] total 31 [2021-11-23 03:51:26,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755494731] [2021-11-23 03:51:26,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:26,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 03:51:26,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 03:51:26,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:51:26,308 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 23 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:51:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:27,496 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-11-23 03:51:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:51:27,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2021-11-23 03:51:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:27,497 INFO L225 Difference]: With dead ends: 94 [2021-11-23 03:51:27,497 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 03:51:27,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 03:51:27,498 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 222 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:27,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 770 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 429 Invalid, 0 Unknown, 8 Unchecked, 0.9s Time] [2021-11-23 03:51:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 03:51:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-11-23 03:51:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 83 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:51:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-11-23 03:51:27,503 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 42 [2021-11-23 03:51:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:27,503 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-11-23 03:51:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:51:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-11-23 03:51:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 03:51:27,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:27,504 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, 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 03:51:27,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:27,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:27,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:28,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:28,107 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:28,107 INFO L85 PathProgramCache]: Analyzing trace with hash 706592269, now seen corresponding path program 1 times [2021-11-23 03:51:28,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:28,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070332805] [2021-11-23 03:51:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:28,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:28,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:28,116 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:28,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 03:51:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:28,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:51:28,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:28,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:28,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070332805] [2021-11-23 03:51:28,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070332805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:28,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [358330575] [2021-11-23 03:51:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:28,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:28,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:28,463 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:28,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-23 03:51:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:51:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:28,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:28,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [358330575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:28,925 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:51:28,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [6, 6] total 19 [2021-11-23 03:51:28,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189979814] [2021-11-23 03:51:28,925 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:28,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:51:28,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:51:28,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:51:28,926 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:51:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:29,094 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-11-23 03:51:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:51:29,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2021-11-23 03:51:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:29,096 INFO L225 Difference]: With dead ends: 94 [2021-11-23 03:51:29,096 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 03:51:29,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:51:29,097 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 72 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:29,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 569 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:51:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 03:51:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-23 03:51:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 81 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:51:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-11-23 03:51:29,101 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 48 [2021-11-23 03:51:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:29,101 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-11-23 03:51:29,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:51:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-11-23 03:51:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 03:51:29,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:29,102 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:29,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:29,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-11-23 03:51:29,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:29,515 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_kobject_putErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 945036502, now seen corresponding path program 1 times [2021-11-23 03:51:29,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:29,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169030409] [2021-11-23 03:51:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:29,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:29,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:29,517 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:29,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 03:51:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:29,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:29,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:29,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169030409] [2021-11-23 03:51:29,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169030409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:29,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [6372717] [2021-11-23 03:51:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:29,856 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:29,857 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:29,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-23 03:51:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:30,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:30,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:30,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [6372717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:30,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510755605] [2021-11-23 03:51:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:30,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:30,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:30,236 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:30,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 03:51:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:30,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:51:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:30,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:51:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:30,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:30,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510755605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:30,930 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:51:30,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [6, 6, 6, 6] total 21 [2021-11-23 03:51:30,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964244896] [2021-11-23 03:51:30,931 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:30,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:51:30,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:51:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:51:30,932 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 13 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:31,516 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-11-23 03:51:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:51:31,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2021-11-23 03:51:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:31,518 INFO L225 Difference]: With dead ends: 98 [2021-11-23 03:51:31,518 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 03:51:31,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 252 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:51:31,519 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 123 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:31,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 299 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 22 Unchecked, 0.4s Time] [2021-11-23 03:51:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 03:51:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-11-23 03:51:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 86 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:51:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-11-23 03:51:31,525 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 48 [2021-11-23 03:51:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:31,526 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-11-23 03:51:31,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:31,527 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-11-23 03:51:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 03:51:31,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:31,529 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:31,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:31,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:31,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-11-23 03:51:32,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:32,139 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_kobject_putErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash 945036503, now seen corresponding path program 1 times [2021-11-23 03:51:32,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:32,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55171449] [2021-11-23 03:51:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:32,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:32,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:32,141 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:32,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 03:51:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:32,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:32,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:32,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55171449] [2021-11-23 03:51:32,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55171449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:32,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [753867754] [2021-11-23 03:51:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:32,473 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:32,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:32,473 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:32,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-23 03:51:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:32,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:51:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:32,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:32,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [753867754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139410049] [2021-11-23 03:51:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:32,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:32,802 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:32,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 03:51:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:51:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:32,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:33,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139410049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:33,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:51:33,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-23 03:51:33,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261706408] [2021-11-23 03:51:33,138 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:33,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:51:33,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:33,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:51:33,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:51:33,140 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:33,292 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2021-11-23 03:51:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:51:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2021-11-23 03:51:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:33,296 INFO L225 Difference]: With dead ends: 99 [2021-11-23 03:51:33,296 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 03:51:33,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:51:33,297 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 90 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:33,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 443 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:51:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 03:51:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-23 03:51:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.2125) internal successors, (97), 90 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:51:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-11-23 03:51:33,301 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 48 [2021-11-23 03:51:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:33,302 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-11-23 03:51:33,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-11-23 03:51:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 03:51:33,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:33,303 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:33,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-23 03:51:33,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-23 03:51:33,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:33,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:33,913 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_kobject_putErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash -971976041, now seen corresponding path program 2 times [2021-11-23 03:51:33,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:33,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136145797] [2021-11-23 03:51:33,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:51:33,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:33,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:33,915 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:33,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 03:51:34,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 03:51:34,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:51:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 03:51:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:34,070 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 03:51:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:51:34,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:51:35,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:35,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136145797] [2021-11-23 03:51:35,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136145797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:35,828 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:35,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 12] imperfect sequences [] total 24 [2021-11-23 03:51:35,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336484679] [2021-11-23 03:51:35,829 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:35,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:51:35,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:51:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:51:35,830 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 25 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:51:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:37,673 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-11-23 03:51:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:51:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 52 [2021-11-23 03:51:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:37,675 INFO L225 Difference]: With dead ends: 123 [2021-11-23 03:51:37,675 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 03:51:37,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:51:37,677 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 280 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:37,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 784 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 453 Invalid, 0 Unknown, 23 Unchecked, 1.3s Time] [2021-11-23 03:51:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 03:51:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2021-11-23 03:51:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 97 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:51:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-11-23 03:51:37,694 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 52 [2021-11-23 03:51:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:37,694 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-11-23 03:51:37,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:51:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-11-23 03:51:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 03:51:37,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:37,695 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:37,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:37,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:37,907 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_kobject_putErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 531323900, now seen corresponding path program 1 times [2021-11-23 03:51:37,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:37,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243105919] [2021-11-23 03:51:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:37,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:37,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:37,909 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:37,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 03:51:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:51:38,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:38,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:38,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243105919] [2021-11-23 03:51:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243105919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933140285] [2021-11-23 03:51:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:38,534 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:38,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:38,534 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:38,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-23 03:51:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:51:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:51:39,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:51:39,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933140285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:39,281 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:51:39,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [10, 10] total 29 [2021-11-23 03:51:39,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584835139] [2021-11-23 03:51:39,282 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:39,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:51:39,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:51:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:51:39,283 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:39,903 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-11-23 03:51:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:51:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-11-23 03:51:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:39,905 INFO L225 Difference]: With dead ends: 113 [2021-11-23 03:51:39,905 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 03:51:39,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 03:51:39,906 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 180 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:39,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 454 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:51:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 03:51:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2021-11-23 03:51:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 96 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:51:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2021-11-23 03:51:39,911 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 55 [2021-11-23 03:51:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:39,911 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2021-11-23 03:51:39,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2021-11-23 03:51:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 03:51:39,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:39,913 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:39,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-11-23 03:51:40,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-11-23 03:51:40,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:51:40,315 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_kobject_putErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1715966202, now seen corresponding path program 1 times [2021-11-23 03:51:40,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:40,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647095633] [2021-11-23 03:51:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:40,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:40,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:40,317 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:40,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 03:51:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:51:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:40,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:40,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:51:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647095633] [2021-11-23 03:51:40,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647095633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [838245515] [2021-11-23 03:51:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:40,901 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:51:40,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:51:40,902 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:51:40,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-23 03:51:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:41,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:51:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:41,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:41,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [838245515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:41,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327840154] [2021-11-23 03:51:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:41,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:41,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:41,311 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:41,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 03:51:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:51:41,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:41,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:42,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327840154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:42,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:51:42,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 25 [2021-11-23 03:51:42,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472211688] [2021-11-23 03:51:42,143 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:42,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:51:42,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:51:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:51:42,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:51:42,145 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:42,709 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-11-23 03:51:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:51:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-11-23 03:51:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:42,710 INFO L225 Difference]: With dead ends: 113 [2021-11-23 03:51:42,710 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 03:51:42,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=341, Invalid=715, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 03:51:42,711 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 150 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:42,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 940 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:51:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 03:51:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-23 03:51:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 104 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:51:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2021-11-23 03:51:42,716 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 58 [2021-11-23 03:51:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:42,716 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2021-11-23 03:51:42,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:51:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2021-11-23 03:51:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 03:51:42,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:42,717 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:42,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-23 03:51:42,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:43,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-23 03:51:43,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:43,318 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_kobject_putErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-11-23 03:51:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1302872966, now seen corresponding path program 2 times [2021-11-23 03:51:43,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:51:43,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71592713] [2021-11-23 03:51:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:51:43,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:51:43,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:51:43,321 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:51:43,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6eeff7-183b-43b5-8956-4be6bcf21e00/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 03:51:43,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 03:51:43,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:51:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-23 03:51:43,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:43,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:43,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:43,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 41 [2021-11-23 03:51:45,842 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_1 (_ BitVec 8))) (= (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (let ((.cse0 (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|))) (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_DerPreprocessor_1) .cse0 (select (select |c_#memory_int| |c_LDV_INIT_LIST_HEAD_#in~list.base|) .cse0)))) |c_#memory_int|)) is different from true [2021-11-23 03:51:45,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:45,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:45,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 62 [2021-11-23 03:51:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:46,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:46,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:46,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:46,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:46,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 193 treesize of output 165 [2021-11-23 03:51:47,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:47,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2021-11-23 03:51:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 03:51:47,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:52,421 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20| (_ BitVec 32)) (|v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ BitVec 32))) (or (not (= (let ((.cse7 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv15 32))) (.cse2 (bvadd (_ bv14 32) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8|)) (.cse3 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv13 32))) (.cse5 (select |c_#memory_int| |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20|)) (.cse4 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (let ((.cse6 (bvadd (concat (concat (concat (select .cse5 .cse7) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4)) (_ bv1 32)))) (let ((.cse0 ((_ extract 31 24) .cse6))) (let ((.cse1 (store (store (store (store .cse5 .cse4 ((_ extract 7 0) .cse6)) .cse3 ((_ extract 15 8) .cse6)) .cse2 ((_ extract 23 16) .cse6)) .cse7 .cse0))) (concat (concat (concat .cse0 (select .cse1 .cse2)) (select .cse1 .cse3)) (select .cse1 .cse4)))))) (_ bv1 32))) (exists ((v_DerPreprocessor_3 (_ BitVec 8)) (v_DerPreprocessor_2 (_ BitVec 8))) (= (let ((.cse15 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv15 32))) (.cse10 (bvadd (_ bv14 32) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8|)) (.cse11 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv13 32))) (.cse13 (select (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_DerPreprocessor_3) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_DerPreprocessor_2)) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20|)) (.cse12 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (let ((.cse14 (bvadd (concat (concat (concat (select .cse13 .cse15) (select .cse13 .cse10)) (select .cse13 .cse11)) (select .cse13 .cse12)) (_ bv1 32)))) (let ((.cse8 ((_ extract 31 24) .cse14))) (let ((.cse9 (store (store (store (store .cse13 .cse12 ((_ extract 7 0) .cse14)) .cse11 ((_ extract 15 8) .cse14)) .cse10 ((_ extract 23 16) .cse14)) .cse15 .cse8))) (concat (concat (concat .cse8 (select .cse9 .cse10)) (select .cse9 .cse11)) (select .cse9 .cse12)))))) (_ bv1 32))))) is different from false [2021-11-23 03:51:54,529 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 8)) (|v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_3 (_ BitVec 8)) (v_DerPreprocessor_2 (_ BitVec 8))) (= (let ((.cse7 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv15 32))) (.cse2 (bvadd (_ bv14 32) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8|)) (.cse3 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv13 32))) (.cse5 (select (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_DerPreprocessor_3) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_DerPreprocessor_2)) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20|)) (.cse4 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (let ((.cse6 (bvadd (concat (concat (concat (select .cse5 .cse7) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4)) (_ bv1 32)))) (let ((.cse0 ((_ extract 31 24) .cse6))) (let ((.cse1 (store (store (store (store .cse5 .cse4 ((_ extract 7 0) .cse6)) .cse3 ((_ extract 15 8) .cse6)) .cse2 ((_ extract 23 16) .cse6)) .cse7 .cse0))) (concat (concat (concat .cse0 (select .cse1 .cse2)) (select .cse1 .cse3)) (select .cse1 .cse4)))))) (_ bv1 32))) (not (= (let ((.cse15 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv15 32))) (.cse10 (bvadd (_ bv14 32) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8|)) (.cse11 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv13 32))) (.cse13 (select (store |c_#memory_int| c_LDV_INIT_LIST_HEAD_~list.base (store (select |c_#memory_int| c_LDV_INIT_LIST_HEAD_~list.base) (bvadd (_ bv4 32) c_LDV_INIT_LIST_HEAD_~list.offset) v_DerPreprocessor_4)) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20|)) (.cse12 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (let ((.cse14 (bvadd (concat (concat (concat (select .cse13 .cse15) (select .cse13 .cse10)) (select .cse13 .cse11)) (select .cse13 .cse12)) (_ bv1 32)))) (let ((.cse8 ((_ extract 31 24) .cse14))) (let ((.cse9 (store (store (store (store .cse13 .cse12 ((_ extract 7 0) .cse14)) .cse11 ((_ extract 15 8) .cse14)) .cse10 ((_ extract 23 16) .cse14)) .cse15 .cse8))) (concat (concat (concat .cse8 (select .cse9 .cse10)) (select .cse9 .cse11)) (select .cse9 .cse12)))))) (_ bv1 32))))) is different from false [2021-11-23 03:51:56,630 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 8)) (v_DerPreprocessor_4 (_ BitVec 8)) (|v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_3 (_ BitVec 8)) (v_DerPreprocessor_2 (_ BitVec 8))) (= (let ((.cse7 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv15 32))) (.cse2 (bvadd (_ bv14 32) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8|)) (.cse3 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv13 32))) (.cse5 (select (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_DerPreprocessor_3) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_DerPreprocessor_2)) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20|)) (.cse4 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (let ((.cse6 (bvadd (concat (concat (concat (select .cse5 .cse7) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4)) (_ bv1 32)))) (let ((.cse0 ((_ extract 31 24) .cse6))) (let ((.cse1 (store (store (store (store .cse5 .cse4 ((_ extract 7 0) .cse6)) .cse3 ((_ extract 15 8) .cse6)) .cse2 ((_ extract 23 16) .cse6)) .cse7 .cse0))) (concat (concat (concat .cse0 (select .cse1 .cse2)) (select .cse1 .cse3)) (select .cse1 .cse4)))))) (_ bv1 32))) (not (= (_ bv1 32) (let ((.cse15 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv15 32))) (.cse10 (bvadd (_ bv14 32) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8|)) (.cse11 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv13 32))) (.cse13 (select (store |c_#memory_int| c_LDV_INIT_LIST_HEAD_~list.base (store (store (select |c_#memory_int| c_LDV_INIT_LIST_HEAD_~list.base) c_LDV_INIT_LIST_HEAD_~list.offset v_DerPreprocessor_5) (bvadd (_ bv4 32) c_LDV_INIT_LIST_HEAD_~list.offset) v_DerPreprocessor_4)) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20|)) (.cse12 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (let ((.cse14 (bvadd (concat (concat (concat (select .cse13 .cse15) (select .cse13 .cse10)) (select .cse13 .cse11)) (select .cse13 .cse12)) (_ bv1 32)))) (let ((.cse8 ((_ extract 31 24) .cse14))) (let ((.cse9 (store (store (store (store .cse13 .cse12 ((_ extract 7 0) .cse14)) .cse11 ((_ extract 15 8) .cse14)) .cse10 ((_ extract 23 16) .cse14)) .cse15 .cse8))) (concat (concat (concat .cse8 (select .cse9 .cse10)) (select .cse9 .cse11)) (select .cse9 .cse12)))))))))) is different from false [2021-11-23 03:51:58,682 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20| (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 8)) (v_DerPreprocessor_4 (_ BitVec 8)) (|v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ BitVec 32))) (or (not (= (let ((.cse7 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv15 32))) (.cse2 (bvadd (_ bv14 32) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8|)) (.cse3 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv13 32))) (.cse5 (select (store |c_#memory_int| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_#memory_int| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_DerPreprocessor_5) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_DerPreprocessor_4)) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20|)) (.cse4 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (let ((.cse6 (bvadd (concat (concat (concat (select .cse5 .cse7) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4)) (_ bv1 32)))) (let ((.cse0 ((_ extract 31 24) .cse6))) (let ((.cse1 (store (store (store (store .cse5 .cse4 ((_ extract 7 0) .cse6)) .cse3 ((_ extract 15 8) .cse6)) .cse2 ((_ extract 23 16) .cse6)) .cse7 .cse0))) (concat (concat (concat .cse0 (select .cse1 .cse2)) (select .cse1 .cse3)) (select .cse1 .cse4)))))) (_ bv1 32))) (exists ((v_DerPreprocessor_3 (_ BitVec 8)) (v_DerPreprocessor_2 (_ BitVec 8))) (= (let ((.cse15 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv15 32))) (.cse10 (bvadd (_ bv14 32) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8|)) (.cse11 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv13 32))) (.cse13 (select (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) |c_LDV_INIT_LIST_HEAD_#in~list.offset| v_DerPreprocessor_3) (bvadd (_ bv4 32) |c_LDV_INIT_LIST_HEAD_#in~list.offset|) v_DerPreprocessor_2)) |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base_BEFORE_CALL_20|)) (.cse12 (bvadd |v_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset_BEFORE_CALL_8| (_ bv12 32)))) (let ((.cse14 (bvadd (concat (concat (concat (select .cse13 .cse15) (select .cse13 .cse10)) (select .cse13 .cse11)) (select .cse13 .cse12)) (_ bv1 32)))) (let ((.cse8 ((_ extract 31 24) .cse14))) (let ((.cse9 (store (store (store (store .cse13 .cse12 ((_ extract 7 0) .cse14)) .cse11 ((_ extract 15 8) .cse14)) .cse10 ((_ extract 23 16) .cse14)) .cse15 .cse8))) (concat (concat (concat .cse8 (select .cse9 .cse10)) (select .cse9 .cse11)) (select .cse9 .cse12)))))) (_ bv1 32))))) is different from false [2021-11-23 03:52:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:26,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:26,523 INFO L190 IndexEqualityManager]: detected not equals via solver