./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta --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 22dc13e3a229fecb317fd9f602c1cc7d4d730ee1501bd597861fd3e87e82c9e9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:37:34,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:34,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:34,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:34,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:34,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:34,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:34,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:34,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:34,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:34,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:34,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:34,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:34,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:34,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:34,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:34,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:34,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:34,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:34,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:34,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:34,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:34,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:34,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:34,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:34,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:34,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:34,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:34,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:34,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:34,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:34,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:34,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:34,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:34,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:34,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:34,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:34,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:34,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:34,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:34,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:34,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-10-17 17:37:34,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:34,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:34,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:34,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:34,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:34,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:34,689 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:34,690 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:34,690 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:34,690 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:34,691 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:34,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:34,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:34,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:34,693 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:34,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:34,694 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:34,694 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:34,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 17:37:34,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 17:37:34,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:34,696 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:37:34,696 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 17:37:34,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:34,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:37:34,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:34,706 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 17:37:34,706 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 17:37:34,707 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 17:37:34,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:34,707 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:37:34,708 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:37:34,708 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:34,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:34,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:34,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:34,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:34,711 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:34,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:34,711 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:34,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:34,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:34,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22dc13e3a229fecb317fd9f602c1cc7d4d730ee1501bd597861fd3e87e82c9e9 [2022-10-17 17:37:34,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:35,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:35,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:35,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:35,015 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:35,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2022-10-17 17:37:35,086 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data/ea9dc5f4d/d07915d354014257b5c0cf4c13f56084/FLAGb73a55b6a [2022-10-17 17:37:35,648 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:35,652 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2022-10-17 17:37:35,673 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data/ea9dc5f4d/d07915d354014257b5c0cf4c13f56084/FLAGb73a55b6a [2022-10-17 17:37:35,930 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data/ea9dc5f4d/d07915d354014257b5c0cf4c13f56084 [2022-10-17 17:37:35,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:37:35,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:37:35,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:35,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:37:35,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:37:35,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:35" (1/1) ... [2022-10-17 17:37:35,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39caf73b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:35, skipping insertion in model container [2022-10-17 17:37:35,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:35" (1/1) ... [2022-10-17 17:37:35,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:37:36,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:36,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:36,454 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-10-17 17:37:36,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2870cc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:36, skipping insertion in model container [2022-10-17 17:37:36,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:36,455 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-10-17 17:37:36,457 INFO L158 Benchmark]: Toolchain (without parser) took 521.87ms. Allocated memory is still 100.7MB. Free memory was 55.9MB in the beginning and 72.3MB in the end (delta: -16.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:37:36,458 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 100.7MB. Free memory is still 73.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:37:36,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 509.53ms. Allocated memory is still 100.7MB. Free memory was 80.4MB in the beginning and 72.3MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 17:37:36,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 100.7MB. Free memory is still 73.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 509.53ms. Allocated memory is still 100.7MB. Free memory was 80.4MB in the beginning and 72.3MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta --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 22dc13e3a229fecb317fd9f602c1cc7d4d730ee1501bd597861fd3e87e82c9e9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:37:38,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:38,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:38,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:38,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:38,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:38,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:38,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:38,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:38,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:38,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:38,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:38,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:38,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:38,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:38,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:38,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:38,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:38,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:38,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:38,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:38,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:38,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:38,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:38,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:38,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:38,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:38,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:38,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:38,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:38,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:38,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:38,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:38,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:38,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:38,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:38,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:38,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:38,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:38,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:38,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:38,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-10-17 17:37:38,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:38,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:38,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:38,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:38,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:38,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:38,978 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:38,978 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:38,978 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:38,979 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:38,980 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:38,980 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:38,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 17:37:38,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 17:37:38,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:38,983 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:37:38,983 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 17:37:38,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:38,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:37:38,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:38,984 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 17:37:38,984 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 17:37:38,984 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 17:37:38,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:38,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:37:38,985 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 17:37:38,985 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 17:37:38,985 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:37:38,985 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:38,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:38,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 17:37:38,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:38,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:38,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:38,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:38,988 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-10-17 17:37:38,988 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 17:37:38,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:38,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 17:37:38,989 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_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22dc13e3a229fecb317fd9f602c1cc7d4d730ee1501bd597861fd3e87e82c9e9 [2022-10-17 17:37:39,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:39,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:39,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:39,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:39,425 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:39,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2022-10-17 17:37:39,508 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data/2622747af/51cfbddd806a4b62a109f977f3fbffe8/FLAG7b2be5acd [2022-10-17 17:37:40,171 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:40,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2022-10-17 17:37:40,188 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data/2622747af/51cfbddd806a4b62a109f977f3fbffe8/FLAG7b2be5acd [2022-10-17 17:37:40,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/data/2622747af/51cfbddd806a4b62a109f977f3fbffe8 [2022-10-17 17:37:40,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:37:40,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:37:40,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:40,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:37:40,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:37:40,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:40" (1/1) ... [2022-10-17 17:37:40,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59e5d838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:40, skipping insertion in model container [2022-10-17 17:37:40,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:40" (1/1) ... [2022-10-17 17:37:40,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:37:40,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:41,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:41,050 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-10-17 17:37:41,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:41,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:41,142 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:37:41,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:41,249 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:37:41,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41 WrapperNode [2022-10-17 17:37:41,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:41,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:41,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:37:41,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:37:41,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,303 INFO L138 Inliner]: procedures = 165, calls = 71, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 26 [2022-10-17 17:37:41,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:41,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:37:41,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:37:41,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:37:41,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,327 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:37:41,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:37:41,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:37:41,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:37:41,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (1/1) ... [2022-10-17 17:37:41,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:41,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:37:41,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:37:41,497 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:37:41,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:37:41,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:37:41,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:37:41,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:37:41,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:37:41,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:37:41,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:37:41,663 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:37:41,665 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:37:41,843 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:37:41,849 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:37:41,850 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:37:41,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:41 BoogieIcfgContainer [2022-10-17 17:37:41,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:37:41,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:37:41,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:37:41,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:37:41,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:37:40" (1/3) ... [2022-10-17 17:37:41,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70fca95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:41, skipping insertion in model container [2022-10-17 17:37:41,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:41" (2/3) ... [2022-10-17 17:37:41,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70fca95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:41, skipping insertion in model container [2022-10-17 17:37:41,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:41" (3/3) ... [2022-10-17 17:37:41,861 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test4-2.i [2022-10-17 17:37:41,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:37:41,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-10-17 17:37:41,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:37:41,937 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56fda9ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:37:41,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-10-17 17:37:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:37:41,957 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:41,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:41,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1438496263, now seen corresponding path program 1 times [2022-10-17 17:37:41,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:41,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146153548] [2022-10-17 17:37:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:41,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:41,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:41,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:41,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 17:37:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:42,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:42,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146153548] [2022-10-17 17:37:42,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146153548] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:42,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:42,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:37:42,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596603091] [2022-10-17 17:37:42,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:42,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:37:42,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:37:42,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:42,355 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:42,504 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-10-17 17:37:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:37:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:37:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:42,522 INFO L225 Difference]: With dead ends: 50 [2022-10-17 17:37:42,523 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 17:37:42,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:42,537 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:42,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 142 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 17:37:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30. [2022-10-17 17:37:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:37:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-10-17 17:37:42,650 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-10-17 17:37:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:42,651 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-10-17 17:37:42,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-10-17 17:37:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:37:42,653 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:42,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:42,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:42,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:42,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash -550992582, now seen corresponding path program 1 times [2022-10-17 17:37:42,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:42,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335454518] [2022-10-17 17:37:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:42,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:42,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 17:37:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:42,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:42,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:42,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335454518] [2022-10-17 17:37:42,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335454518] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:42,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:42,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327265387] [2022-10-17 17:37:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:42,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:37:42,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:37:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:37:42,996 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:43,097 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-10-17 17:37:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:37:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:37:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:43,100 INFO L225 Difference]: With dead ends: 40 [2022-10-17 17:37:43,100 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 17:37:43,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:37:43,102 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:43,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 80 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 17:37:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-10-17 17:37:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-10-17 17:37:43,110 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 11 [2022-10-17 17:37:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:43,111 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-10-17 17:37:43,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-10-17 17:37:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:37:43,112 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:43,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:43,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:43,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:43,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1707085477, now seen corresponding path program 1 times [2022-10-17 17:37:43,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:43,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445997656] [2022-10-17 17:37:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:43,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:43,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:43,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:43,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 17:37:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:43,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:43,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445997656] [2022-10-17 17:37:43,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445997656] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:43,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:43,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:37:43,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411162664] [2022-10-17 17:37:43,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:43,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:37:43,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:43,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:37:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:43,476 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:43,497 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-10-17 17:37:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:37:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-10-17 17:37:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:43,499 INFO L225 Difference]: With dead ends: 25 [2022-10-17 17:37:43,499 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 17:37:43,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:43,501 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:43,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:37:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 17:37:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-17 17:37:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-10-17 17:37:43,507 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2022-10-17 17:37:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:43,507 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-10-17 17:37:43,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-10-17 17:37:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:37:43,509 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:43,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:43,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:43,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:43,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1380042284, now seen corresponding path program 1 times [2022-10-17 17:37:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:43,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624024206] [2022-10-17 17:37:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:43,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:43,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:43,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:43,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 17:37:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:43,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:37:43,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:44,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:44,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:44,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624024206] [2022-10-17 17:37:44,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624024206] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:44,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:44,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:37:44,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332727483] [2022-10-17 17:37:44,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:44,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:37:44,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:44,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:37:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:37:44,174 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:44,193 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-10-17 17:37:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:37:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-10-17 17:37:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:44,196 INFO L225 Difference]: With dead ends: 42 [2022-10-17 17:37:44,197 INFO L226 Difference]: Without dead ends: 42 [2022-10-17 17:37:44,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:37:44,199 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:44,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-10-17 17:37:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-17 17:37:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-10-17 17:37:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:37:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-10-17 17:37:44,208 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 17 [2022-10-17 17:37:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:44,209 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-10-17 17:37:44,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-10-17 17:37:44,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:37:44,211 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:44,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:44,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:44,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1408671435, now seen corresponding path program 1 times [2022-10-17 17:37:44,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:44,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544892275] [2022-10-17 17:37:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:44,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:44,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:44,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:44,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-10-17 17:37:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:37:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:44,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:44,683 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:44,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544892275] [2022-10-17 17:37:44,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544892275] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:44,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:44,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:37:44,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646198820] [2022-10-17 17:37:44,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:44,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:37:44,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:44,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:37:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:44,686 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:44,794 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-10-17 17:37:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:37:44,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-10-17 17:37:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:44,796 INFO L225 Difference]: With dead ends: 58 [2022-10-17 17:37:44,796 INFO L226 Difference]: Without dead ends: 58 [2022-10-17 17:37:44,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:44,798 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:44,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-17 17:37:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-10-17 17:37:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:37:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-10-17 17:37:44,806 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 17 [2022-10-17 17:37:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:44,807 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-10-17 17:37:44,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-10-17 17:37:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:37:44,808 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:44,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:44,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:45,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:45,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1086639277, now seen corresponding path program 2 times [2022-10-17 17:37:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:45,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599087293] [2022-10-17 17:37:45,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 17:37:45,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:45,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:45,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-10-17 17:37:45,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 17:37:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:45,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:37:45,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:45,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:45,209 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:45,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599087293] [2022-10-17 17:37:45,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599087293] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:45,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:45,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:37:45,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315745346] [2022-10-17 17:37:45,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:45,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:37:45,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:37:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:45,211 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:45,304 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-10-17 17:37:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:37:45,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-10-17 17:37:45,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:45,309 INFO L225 Difference]: With dead ends: 57 [2022-10-17 17:37:45,309 INFO L226 Difference]: Without dead ends: 57 [2022-10-17 17:37:45,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:45,310 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:45,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-17 17:37:45,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2022-10-17 17:37:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.25) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:37:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-10-17 17:37:45,318 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 17 [2022-10-17 17:37:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:45,318 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-10-17 17:37:45,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-10-17 17:37:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:37:45,319 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:45,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:45,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:45,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:45,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -168362105, now seen corresponding path program 1 times [2022-10-17 17:37:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:45,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338479724] [2022-10-17 17:37:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:45,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:45,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:45,533 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:45,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-10-17 17:37:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:37:45,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:45,646 INFO L390 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 7 [2022-10-17 17:37:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:45,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:45,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338479724] [2022-10-17 17:37:45,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338479724] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:45,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:45,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:37:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085990067] [2022-10-17 17:37:45,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:45,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:37:45,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:37:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:45,697 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:45,765 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-10-17 17:37:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:37:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-10-17 17:37:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:45,768 INFO L225 Difference]: With dead ends: 35 [2022-10-17 17:37:45,771 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 17:37:45,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:45,775 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:45,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 17:37:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2022-10-17 17:37:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-10-17 17:37:45,799 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 18 [2022-10-17 17:37:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:45,799 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-10-17 17:37:45,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-10-17 17:37:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:37:45,801 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:45,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:45,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:46,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:46,015 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash -924257906, now seen corresponding path program 1 times [2022-10-17 17:37:46,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:46,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381487811] [2022-10-17 17:37:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:46,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:46,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:46,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-10-17 17:37:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:46,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:46,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381487811] [2022-10-17 17:37:46,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381487811] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1374075103] [2022-10-17 17:37:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:46,244 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:37:46,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:37:46,247 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:37:46,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-10-17 17:37:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:46,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:46,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1374075103] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487619215] [2022-10-17 17:37:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:46,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:46,466 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:46,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 17:37:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:46,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:46,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487619215] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:46,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:37:46,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-10-17 17:37:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956512251] [2022-10-17 17:37:46,627 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:46,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:37:46,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:37:46,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:46,630 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:46,653 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-10-17 17:37:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:37:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-10-17 17:37:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:46,657 INFO L225 Difference]: With dead ends: 26 [2022-10-17 17:37:46,657 INFO L226 Difference]: Without dead ends: 26 [2022-10-17 17:37:46,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:46,658 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:46,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:37:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-17 17:37:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-10-17 17:37:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-10-17 17:37:46,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2022-10-17 17:37:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:46,678 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-10-17 17:37:46,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-10-17 17:37:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 17:37:46,680 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:46,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:46,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:46,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:47,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:47,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:47,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:47,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1412776041, now seen corresponding path program 1 times [2022-10-17 17:37:47,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:47,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519323514] [2022-10-17 17:37:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:47,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:47,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:47,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:47,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-10-17 17:37:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:47,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:37:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:47,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:47,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519323514] [2022-10-17 17:37:47,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519323514] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1521625827] [2022-10-17 17:37:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:47,780 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:37:47,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:37:47,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:37:47,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-10-17 17:37:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:47,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:47,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1521625827] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712543435] [2022-10-17 17:37:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:47,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:47,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:47,982 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:48,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-17 17:37:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:48,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:48,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712543435] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:48,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:37:48,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-10-17 17:37:48,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167450625] [2022-10-17 17:37:48,163 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:48,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:37:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:37:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:37:48,165 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-17 17:37:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:48,366 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-10-17 17:37:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:37:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 20 [2022-10-17 17:37:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:48,368 INFO L225 Difference]: With dead ends: 46 [2022-10-17 17:37:48,368 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 17:37:48,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:37:48,369 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:48,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 84 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-10-17 17:37:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 17:37:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 25. [2022-10-17 17:37:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-10-17 17:37:48,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2022-10-17 17:37:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:48,374 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-10-17 17:37:48,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-17 17:37:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-10-17 17:37:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:37:48,376 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:48,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:48,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:48,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-10-17 17:37:48,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-10-17 17:37:49,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:49,002 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 846384368, now seen corresponding path program 1 times [2022-10-17 17:37:49,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:49,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243992746] [2022-10-17 17:37:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:49,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:49,004 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:49,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-10-17 17:37:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:37:49,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:49,081 INFO L390 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 7 [2022-10-17 17:37:49,188 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:37:49,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-10-17 17:37:49,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-10-17 17:37:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:49,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:49,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:49,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243992746] [2022-10-17 17:37:49,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243992746] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:49,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2118428737] [2022-10-17 17:37:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:49,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:37:49,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:37:49,670 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:37:49,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-10-17 17:37:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:37:49,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:49,812 INFO L390 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 7 [2022-10-17 17:37:49,890 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:37:49,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-10-17 17:37:49,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-10-17 17:37:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:49,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:52,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2118428737] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:52,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192773592] [2022-10-17 17:37:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:52,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:52,342 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:52,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-17 17:37:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:37:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:52,504 INFO L390 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 7 [2022-10-17 17:37:52,615 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:37:52,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-10-17 17:37:52,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-10-17 17:37:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:52,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:54,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192773592] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:54,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:37:54,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-10-17 17:37:54,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500429947] [2022-10-17 17:37:54,092 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:37:54,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:54,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:37:54,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=100, Unknown=1, NotChecked=0, Total=132 [2022-10-17 17:37:54,095 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:37:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:54,252 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-10-17 17:37:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:37:54,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 4 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 21 [2022-10-17 17:37:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:54,254 INFO L225 Difference]: With dead ends: 43 [2022-10-17 17:37:54,254 INFO L226 Difference]: Without dead ends: 43 [2022-10-17 17:37:54,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 11 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2022-10-17 17:37:54,255 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:54,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-10-17 17:37:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-10-17 17:37:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-10-17 17:37:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:37:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-10-17 17:37:54,262 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 21 [2022-10-17 17:37:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:54,263 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-10-17 17:37:54,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:37:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-10-17 17:37:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:37:54,265 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:54,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:54,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:54,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:54,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:54,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:54,876 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash 649870863, now seen corresponding path program 1 times [2022-10-17 17:37:54,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:54,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398637039] [2022-10-17 17:37:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:54,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:54,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:54,880 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:54,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-10-17 17:37:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:37:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:54,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-10-17 17:37:55,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-10-17 17:37:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:55,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:55,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:55,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398637039] [2022-10-17 17:37:55,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398637039] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:55,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [139257933] [2022-10-17 17:37:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:55,497 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:37:55,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:37:55,498 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:37:55,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-10-17 17:37:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:55,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:37:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:55,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-10-17 17:37:55,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-10-17 17:37:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:55,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:55,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [139257933] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362536000] [2022-10-17 17:37:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:55,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:55,950 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:55,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-10-17 17:37:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:56,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:37:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:56,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-10-17 17:37:56,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-10-17 17:37:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:56,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:56,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362536000] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:56,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:37:56,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 8, 9] total 13 [2022-10-17 17:37:56,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60498049] [2022-10-17 17:37:56,386 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:56,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 17:37:56,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:56,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 17:37:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:37:56,390 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:37:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:56,555 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-10-17 17:37:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:37:56,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-10-17 17:37:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:56,557 INFO L225 Difference]: With dead ends: 46 [2022-10-17 17:37:56,557 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 17:37:56,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:37:56,558 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:56,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 100 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-10-17 17:37:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 17:37:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-10-17 17:37:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 17:37:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-10-17 17:37:56,563 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 21 [2022-10-17 17:37:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:56,563 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-10-17 17:37:56,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:37:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-10-17 17:37:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:37:56,565 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:56,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:56,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:56,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:56,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:57,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:37:57,166 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:57,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:57,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2095273231, now seen corresponding path program 2 times [2022-10-17 17:37:57,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:57,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424761393] [2022-10-17 17:37:57,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 17:37:57,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:57,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:57,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:57,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-10-17 17:37:57,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 17:37:57,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:57,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:57,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:37:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424761393] [2022-10-17 17:37:57,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424761393] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926683998] [2022-10-17 17:37:57,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 17:37:57,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:37:57,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:37:57,318 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:37:57,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-10-17 17:37:57,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 17:37:57,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:57,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:57,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:57,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926683998] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:57,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063492653] [2022-10-17 17:37:57,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 17:37:57,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:57,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:57,519 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:57,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-10-17 17:37:57,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 17:37:57,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:37:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:57,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:57,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063492653] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:57,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:37:57,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-10-17 17:37:57,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923365447] [2022-10-17 17:37:57,659 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:57,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:37:57,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:37:57,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:37:57,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:57,661 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:57,691 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-10-17 17:37:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:37:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-10-17 17:37:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:57,693 INFO L225 Difference]: With dead ends: 41 [2022-10-17 17:37:57,693 INFO L226 Difference]: Without dead ends: 41 [2022-10-17 17:37:57,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:57,694 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:57,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:37:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-17 17:37:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2022-10-17 17:37:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-10-17 17:37:57,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2022-10-17 17:37:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:57,699 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-10-17 17:37:57,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:37:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-10-17 17:37:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:37:57,700 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:57,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:57,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:57,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:58,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-10-17 17:37:58,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:58,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 4 more)] === [2022-10-17 17:37:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1626560659, now seen corresponding path program 1 times [2022-10-17 17:37:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:37:58,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598910106] [2022-10-17 17:37:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:37:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:37:58,314 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:37:58,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-10-17 17:37:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:58,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 17:37:58,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:00,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:07,475 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:38:07,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598910106] [2022-10-17 17:38:07,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598910106] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:07,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305487646] [2022-10-17 17:38:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:07,476 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:38:07,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:38:07,486 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:38:07,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b03bbba-373c-485a-92e4-a99eaf132082/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-10-17 17:38:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-17 17:38:07,643 INFO L286 TraceCheckSpWp]: Computing forward predicates...