./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh --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 ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- 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-2329fc7 [2022-12-14 09:24:00,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:24:00,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:24:00,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:24:00,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:24:00,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:24:00,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:24:00,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:24:00,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:24:00,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:24:00,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:24:00,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:24:00,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:24:00,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:24:00,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:24:00,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:24:00,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:24:00,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:24:00,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:24:00,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:24:00,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:24:00,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:24:00,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:24:00,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:24:00,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:24:00,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:24:00,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:24:00,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:24:00,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:24:00,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:24:00,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:24:00,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:24:00,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:24:00,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:24:00,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:24:00,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:24:00,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:24:00,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:24:00,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:24:00,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:24:00,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:24:00,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:24:00,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:24:00,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:24:00,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:24:00,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:24:00,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:24:00,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:24:00,390 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:24:00,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:24:00,390 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:24:00,390 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:24:00,391 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:24:00,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:24:00,391 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:24:00,391 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:24:00,391 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:24:00,392 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:24:00,392 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:24:00,392 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:24:00,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:24:00,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:24:00,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:24:00,393 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:24:00,394 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:24:00,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:24:00,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:24:00,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:24:00,394 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:24:00,394 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:24:00,395 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:24:00,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:24:00,395 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:24:00,395 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:24:00,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:24:00,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:24:00,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:24:00,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:24:00,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:24:00,396 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:24:00,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:24:00,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:24:00,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:24:00,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:24:00,397 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_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2022-12-14 09:24:00,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:24:00,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:24:00,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:24:00,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:24:00,615 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:24:00,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2022-12-14 09:24:03,218 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:24:03,380 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:24:03,380 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2022-12-14 09:24:03,388 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/data/460866905/6fa5f79668e64c9782fdab5bb51085ab/FLAG84665b265 [2022-12-14 09:24:03,398 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/data/460866905/6fa5f79668e64c9782fdab5bb51085ab [2022-12-14 09:24:03,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:24:03,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:24:03,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:24:03,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:24:03,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:24:03,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:24:03" (1/1) ... [2022-12-14 09:24:03,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782f260b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:03, skipping insertion in model container [2022-12-14 09:24:03,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:24:03" (1/1) ... [2022-12-14 09:24:03,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:24:03,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:24:03,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:24:03,623 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) [2022-12-14 09:24:03,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d8e4b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:03, skipping insertion in model container [2022-12-14 09:24:03,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:24:03,624 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 09:24:03,625 INFO L158 Benchmark]: Toolchain (without parser) took 223.52ms. Allocated memory is still 153.1MB. Free memory was 110.1MB in the beginning and 99.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:24:03,626 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 153.1MB. Free memory was 92.9MB in the beginning and 92.7MB in the end (delta: 232.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:24:03,626 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.86ms. Allocated memory is still 153.1MB. Free memory was 110.1MB in the beginning and 99.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:24:03,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 153.1MB. Free memory was 92.9MB in the beginning and 92.7MB in the end (delta: 232.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.86ms. Allocated memory is still 153.1MB. Free memory was 110.1MB in the beginning and 99.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 526]: 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh --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 ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- 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-2329fc7 [2022-12-14 09:24:04,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:24:04,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:24:04,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:24:04,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:24:04,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:24:04,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:24:04,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:24:04,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:24:04,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:24:04,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:24:04,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:24:04,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:24:04,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:24:04,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:24:04,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:24:05,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:24:05,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:24:05,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:24:05,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:24:05,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:24:05,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:24:05,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:24:05,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:24:05,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:24:05,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:24:05,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:24:05,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:24:05,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:24:05,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:24:05,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:24:05,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:24:05,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:24:05,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:24:05,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:24:05,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:24:05,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:24:05,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:24:05,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:24:05,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:24:05,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:24:05,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 09:24:05,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:24:05,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:24:05,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:24:05,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:24:05,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:24:05,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:24:05,050 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:24:05,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:24:05,050 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:24:05,050 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:24:05,050 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:24:05,051 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:24:05,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:24:05,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:24:05,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:24:05,052 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:24:05,052 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:24:05,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:24:05,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:24:05,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:24:05,052 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:24:05,053 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:24:05,053 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:24:05,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:24:05,053 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:24:05,053 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 09:24:05,053 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 09:24:05,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:24:05,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:24:05,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:24:05,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 09:24:05,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:24:05,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:24:05,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:24:05,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:24:05,055 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 09:24:05,055 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:05,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:24:05,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 09:24:05,055 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_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2022-12-14 09:24:05,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:24:05,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:24:05,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:24:05,291 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:24:05,291 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:24:05,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2022-12-14 09:24:07,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:24:08,010 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:24:08,010 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2022-12-14 09:24:08,019 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/data/a78f5dab3/e83c6f08ba7a48cba58804a24d6d6cda/FLAG5504e7f4b [2022-12-14 09:24:08,399 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/data/a78f5dab3/e83c6f08ba7a48cba58804a24d6d6cda [2022-12-14 09:24:08,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:24:08,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:24:08,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:24:08,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:24:08,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:24:08,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13443cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08, skipping insertion in model container [2022-12-14 09:24:08,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:24:08,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:24:08,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:24:08,631 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 09:24:08,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:24:08,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:24:08,657 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:24:08,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:24:08,711 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:24:08,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08 WrapperNode [2022-12-14 09:24:08,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:24:08,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:24:08,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:24:08,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:24:08,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,753 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2022-12-14 09:24:08,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:24:08,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:24:08,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:24:08,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:24:08,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,777 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:24:08,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:24:08,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:24:08,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:24:08,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (1/1) ... [2022-12-14 09:24:08,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:24:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:08,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:24:08,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:24:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 09:24:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:24:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:24:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 09:24:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:24:08,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:24:08,938 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:24:08,940 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:24:09,169 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:24:09,174 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:24:09,174 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 09:24:09,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:24:09 BoogieIcfgContainer [2022-12-14 09:24:09,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:24:09,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:24:09,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:24:09,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:24:09,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:24:08" (1/3) ... [2022-12-14 09:24:09,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155f2e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:24:09, skipping insertion in model container [2022-12-14 09:24:09,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:08" (2/3) ... [2022-12-14 09:24:09,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155f2e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:24:09, skipping insertion in model container [2022-12-14 09:24:09,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:24:09" (3/3) ... [2022-12-14 09:24:09,182 INFO L112 eAbstractionObserver]: Analyzing ICFG java_BubbleSort-alloca-1.i [2022-12-14 09:24:09,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:24:09,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-14 09:24:09,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:24:09,234 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;@122d6a3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:24:09,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-12-14 09:24:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:24:09,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:09,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:24:09,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-12-14 09:24:09,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:09,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611304635] [2022-12-14 09:24:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:09,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:09,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:09,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:09,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 09:24:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:24:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:09,376 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:24:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:09,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:09,392 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:09,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611304635] [2022-12-14 09:24:09,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611304635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:09,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:09,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:24:09,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148356836] [2022-12-14 09:24:09,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:09,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:24:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:09,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:24:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:24:09,421 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:09,490 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-12-14 09:24:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:24:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:24:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:09,498 INFO L225 Difference]: With dead ends: 40 [2022-12-14 09:24:09,498 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 09:24:09,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:24:09,501 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:09,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:24:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 09:24:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 09:24:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-12-14 09:24:09,524 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2022-12-14 09:24:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:09,525 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-12-14 09:24:09,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-12-14 09:24:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:24:09,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:09,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:24:09,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:09,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:09,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-12-14 09:24:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:09,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249892954] [2022-12-14 09:24:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:09,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:09,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:09,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:09,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 09:24:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:24:09,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:09,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:24:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:09,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:09,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:09,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249892954] [2022-12-14 09:24:09,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249892954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:09,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:09,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:24:09,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810111274] [2022-12-14 09:24:09,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:09,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:24:09,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:09,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:24:09,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:24:09,982 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:10,156 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-12-14 09:24:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:24:10,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:24:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:10,158 INFO L225 Difference]: With dead ends: 77 [2022-12-14 09:24:10,158 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 09:24:10,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:24:10,159 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:10,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 145 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:24:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 09:24:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2022-12-14 09:24:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-12-14 09:24:10,164 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2022-12-14 09:24:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:10,164 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-12-14 09:24:10,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-12-14 09:24:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:24:10,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:10,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:24:10,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 09:24:10,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:10,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:10,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-12-14 09:24:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:10,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802302793] [2022-12-14 09:24:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:10,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:10,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:10,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 09:24:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:10,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:24:10,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:10,563 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:10,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:10,613 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:10,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802302793] [2022-12-14 09:24:10,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802302793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:10,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:10,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:24:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881238931] [2022-12-14 09:24:10,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:10,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:24:10,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:24:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:24:10,615 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:10,773 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-12-14 09:24:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:24:10,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:24:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:10,774 INFO L225 Difference]: With dead ends: 45 [2022-12-14 09:24:10,774 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 09:24:10,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:24:10,775 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:10,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 59 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:24:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 09:24:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-12-14 09:24:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-12-14 09:24:10,784 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 6 [2022-12-14 09:24:10,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:10,785 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-12-14 09:24:10,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-12-14 09:24:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:24:10,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:10,785 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:10,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 09:24:10,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:10,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:10,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:10,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-12-14 09:24:10,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:10,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635994660] [2022-12-14 09:24:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:10,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:10,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:10,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:10,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 09:24:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:11,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:24:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:11,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:11,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635994660] [2022-12-14 09:24:11,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635994660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1262687740] [2022-12-14 09:24:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:11,222 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:24:11,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:24:11,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 09:24:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:11,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:24:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:11,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:11,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1262687740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481228490] [2022-12-14 09:24:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:11,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:11,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:11,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:11,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:24:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:24:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:11,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:11,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481228490] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:11,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:24:11,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 09:24:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164659435] [2022-12-14 09:24:11,432 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:24:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:24:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:24:11,433 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:11,507 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-12-14 09:24:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:24:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 09:24:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:11,509 INFO L225 Difference]: With dead ends: 75 [2022-12-14 09:24:11,509 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 09:24:11,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:24:11,510 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 191 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:11,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 135 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:24:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 09:24:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-12-14 09:24:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-12-14 09:24:11,515 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2022-12-14 09:24:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:11,516 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-12-14 09:24:11,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-12-14 09:24:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:24:11,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:11,516 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:11,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 09:24:11,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 09:24:11,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:24:12,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:12,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-12-14 09:24:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:12,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640453189] [2022-12-14 09:24:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:12,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:12,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:12,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:12,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 09:24:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:24:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:12,194 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:12,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:12,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:12,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640453189] [2022-12-14 09:24:12,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640453189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:12,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [522331715] [2022-12-14 09:24:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:12,683 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:24:12,684 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:24:12,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 09:24:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:12,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:24:12,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:12,777 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:12,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:12,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [522331715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:12,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228593205] [2022-12-14 09:24:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:12,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:12,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:13,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:13,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:24:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:24:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:13,058 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:13,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:13,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228593205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:13,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:24:13,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-12-14 09:24:13,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336038100] [2022-12-14 09:24:13,234 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:13,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 09:24:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:13,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 09:24:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:24:13,235 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:14,269 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-12-14 09:24:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:24:14,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 09:24:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:14,271 INFO L225 Difference]: With dead ends: 116 [2022-12-14 09:24:14,271 INFO L226 Difference]: Without dead ends: 116 [2022-12-14 09:24:14,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:24:14,272 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 396 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:14,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 149 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:24:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-14 09:24:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 58. [2022-12-14 09:24:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-12-14 09:24:14,277 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 10 [2022-12-14 09:24:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:14,278 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-12-14 09:24:14,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-12-14 09:24:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:24:14,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:14,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:14,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:14,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:24:14,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 09:24:14,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:14,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:14,886 INFO L85 PathProgramCache]: Analyzing trace with hash 363893197, now seen corresponding path program 1 times [2022-12-14 09:24:14,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:14,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524083351] [2022-12-14 09:24:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:14,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:14,889 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:14,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 09:24:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:24:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:14,993 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc9#1.base_11| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_11|)) (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_11| (_ bv0 1)) |c_#valid|))) is different from true [2022-12-14 09:24:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:24:14,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:14,994 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524083351] [2022-12-14 09:24:14,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524083351] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:14,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:14,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:24:14,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380991050] [2022-12-14 09:24:14,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:14,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:24:14,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:24:14,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-12-14 09:24:14,996 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:15,076 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-12-14 09:24:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:24:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:24:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:15,078 INFO L225 Difference]: With dead ends: 57 [2022-12-14 09:24:15,078 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 09:24:15,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-12-14 09:24:15,079 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:15,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 50 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-12-14 09:24:15,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 09:24:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-14 09:24:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-12-14 09:24:15,084 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 13 [2022-12-14 09:24:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:15,084 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-12-14 09:24:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-12-14 09:24:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:24:15,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:15,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:15,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 09:24:15,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:15,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash 363893999, now seen corresponding path program 1 times [2022-12-14 09:24:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:15,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164503536] [2022-12-14 09:24:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:15,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:15,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:15,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 09:24:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:15,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 09:24:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:24:15,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:15,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164503536] [2022-12-14 09:24:15,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164503536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:15,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:15,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:24:15,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052831646] [2022-12-14 09:24:15,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:15,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:24:15,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:24:15,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:24:15,386 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:15,414 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-12-14 09:24:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:24:15,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:24:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:15,415 INFO L225 Difference]: With dead ends: 57 [2022-12-14 09:24:15,415 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 09:24:15,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:24:15,416 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:15,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:24:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 09:24:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 09:24:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-12-14 09:24:15,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 13 [2022-12-14 09:24:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:15,419 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-12-14 09:24:15,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-12-14 09:24:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:24:15,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:15,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:15,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 09:24:15,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:15,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958577, now seen corresponding path program 1 times [2022-12-14 09:24:15,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:15,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412763865] [2022-12-14 09:24:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:15,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:15,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:15,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:15,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 09:24:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:24:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:15,671 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:24:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:24:15,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:15,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412763865] [2022-12-14 09:24:15,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412763865] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:15,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:15,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:24:15,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86529987] [2022-12-14 09:24:15,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:15,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:24:15,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:24:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:24:15,692 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:15,755 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-12-14 09:24:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:24:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:24:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:15,759 INFO L225 Difference]: With dead ends: 43 [2022-12-14 09:24:15,760 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 09:24:15,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:24:15,760 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:15,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 23 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:24:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 09:24:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 09:24:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-12-14 09:24:15,762 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 13 [2022-12-14 09:24:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:15,763 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-12-14 09:24:15,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-12-14 09:24:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:24:15,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:15,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:15,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 09:24:15,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:15,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2022-12-14 09:24:15,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:15,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685869489] [2022-12-14 09:24:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:15,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:15,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:15,970 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:15,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 09:24:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:16,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:24:16,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:16,020 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:16,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:16,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:16,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685869489] [2022-12-14 09:24:16,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685869489] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:16,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:24:16,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 09:24:16,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970563560] [2022-12-14 09:24:16,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:16,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:24:16,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:24:16,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:24:16,546 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:16,868 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-12-14 09:24:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:24:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:24:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:16,869 INFO L225 Difference]: With dead ends: 45 [2022-12-14 09:24:16,870 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 09:24:16,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:24:16,870 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:16,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:24:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 09:24:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-12-14 09:24:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-14 09:24:16,872 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 13 [2022-12-14 09:24:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:16,873 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-14 09:24:16,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-14 09:24:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:24:16,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:16,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:16,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 09:24:17,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:17,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:17,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2022-12-14 09:24:17,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:17,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408392039] [2022-12-14 09:24:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:17,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:17,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:17,078 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:17,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 09:24:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:17,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 09:24:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:17,183 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:24:17,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:17,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:17,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408392039] [2022-12-14 09:24:17,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408392039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:17,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:17,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:24:17,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523291058] [2022-12-14 09:24:17,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:17,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:24:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:24:17,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:24:17,322 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:17,638 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-12-14 09:24:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:24:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:24:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:17,639 INFO L225 Difference]: With dead ends: 71 [2022-12-14 09:24:17,640 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 09:24:17,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:24:17,640 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 143 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:17,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 29 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:24:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 09:24:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2022-12-14 09:24:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-12-14 09:24:17,644 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2022-12-14 09:24:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:17,644 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-12-14 09:24:17,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-12-14 09:24:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:24:17,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:17,644 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:17,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 09:24:17,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:17,846 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2022-12-14 09:24:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:17,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917594136] [2022-12-14 09:24:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:17,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:17,853 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:17,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 09:24:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:17,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:24:17,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:17,918 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:24:18,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:24:19,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:19,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917594136] [2022-12-14 09:24:19,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917594136] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:19,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1637120824] [2022-12-14 09:24:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:19,279 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:19,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:24:19,280 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:24:19,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 09:24:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:19,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:24:19,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:24:19,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:24:19,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1637120824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:19,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582139898] [2022-12-14 09:24:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:19,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:19,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:19,661 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:19,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 09:24:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:19,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:24:19,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:19,716 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:24:19,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:24:19,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582139898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:19,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:24:19,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 21 [2022-12-14 09:24:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676412415] [2022-12-14 09:24:19,966 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:19,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 09:24:19,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 09:24:19,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:24:19,967 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:23,624 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2022-12-14 09:24:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 09:24:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 09:24:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:23,625 INFO L225 Difference]: With dead ends: 84 [2022-12-14 09:24:23,625 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 09:24:23,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:24:23,626 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 207 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:23,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 143 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:24:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 09:24:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 57. [2022-12-14 09:24:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-12-14 09:24:23,631 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 18 [2022-12-14 09:24:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:23,631 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-12-14 09:24:23,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-12-14 09:24:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 09:24:23,632 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:23,632 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 09:24:23,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-12-14 09:24:23,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 09:24:24,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 09:24:24,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:24,234 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:24,235 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2022-12-14 09:24:24,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:24,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560134108] [2022-12-14 09:24:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:24:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:24,240 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:24,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 09:24:24,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:24:24,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:24,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:24:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:24,324 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:24,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:25,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560134108] [2022-12-14 09:24:25,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560134108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1055437841] [2022-12-14 09:24:25,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:24:25,791 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:25,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:24:25,792 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:24:25,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 09:24:25,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:24:25,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:24:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:25,896 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:26,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:26,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1055437841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:26,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025338710] [2022-12-14 09:24:26,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:24:26,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:26,569 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:26,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 09:24:26,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:24:26,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:26,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 09:24:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:26,635 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:26,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:28,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025338710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:28,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:24:28,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 25 [2022-12-14 09:24:28,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642236715] [2022-12-14 09:24:28,646 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:28,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 09:24:28,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:28,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 09:24:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2022-12-14 09:24:28,647 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:33,692 INFO L93 Difference]: Finished difference Result 319 states and 384 transitions. [2022-12-14 09:24:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 09:24:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 09:24:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:33,694 INFO L225 Difference]: With dead ends: 319 [2022-12-14 09:24:33,694 INFO L226 Difference]: Without dead ends: 319 [2022-12-14 09:24:33,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 09:24:33,696 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 865 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:33,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 389 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 09:24:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-12-14 09:24:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 81. [2022-12-14 09:24:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2022-12-14 09:24:33,702 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 22 [2022-12-14 09:24:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:33,702 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2022-12-14 09:24:33,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2022-12-14 09:24:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:24:33,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:33,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:33,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 09:24:33,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 09:24:34,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:34,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:34,306 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 1 times [2022-12-14 09:24:34,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:34,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396280377] [2022-12-14 09:24:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:34,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:34,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:34,314 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:34,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 09:24:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:34,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:24:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:34,386 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:34,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:36,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396280377] [2022-12-14 09:24:36,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396280377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [485317542] [2022-12-14 09:24:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:36,019 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:24:36,020 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:24:36,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 09:24:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:36,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:24:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:36,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:24:37,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [485317542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675137926] [2022-12-14 09:24:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:37,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:37,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:37,368 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:37,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 09:24:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:37,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:24:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:37,439 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:37,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:38,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675137926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:38,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:24:38,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11, 10, 8, 9] total 35 [2022-12-14 09:24:38,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234288553] [2022-12-14 09:24:38,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:38,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:24:38,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:38,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:24:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:24:38,706 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:50,858 INFO L93 Difference]: Finished difference Result 239 states and 280 transitions. [2022-12-14 09:24:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 09:24:50,859 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 09:24:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:50,859 INFO L225 Difference]: With dead ends: 239 [2022-12-14 09:24:50,859 INFO L226 Difference]: Without dead ends: 239 [2022-12-14 09:24:50,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1090, Invalid=4762, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 09:24:50,860 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 948 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:50,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 201 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 09:24:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-12-14 09:24:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 171. [2022-12-14 09:24:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 169 states have (on average 1.2011834319526626) internal successors, (203), 170 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2022-12-14 09:24:50,865 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 23 [2022-12-14 09:24:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:50,865 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2022-12-14 09:24:50,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2022-12-14 09:24:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:24:50,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:50,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:50,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:51,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:51,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 09:24:51,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:51,468 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:24:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1156994876, now seen corresponding path program 1 times [2022-12-14 09:24:51,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:51,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535697256] [2022-12-14 09:24:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:51,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:24:51,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:51,473 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:24:51,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 09:24:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:24:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:51,578 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:24:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:24:51,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:24:53,257 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535697256] [2022-12-14 09:24:53,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535697256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1882881578] [2022-12-14 09:24:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:53,257 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:53,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:24:53,258 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:24:53,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 09:24:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:53,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:24:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:53,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:54,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1882881578] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:54,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367701239] [2022-12-14 09:24:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:54,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:54,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:54,391 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:54,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 09:24:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:54,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:24:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:24:54,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:24:55,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367701239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:55,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:24:55,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 9, 7] total 39 [2022-12-14 09:24:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947054859] [2022-12-14 09:24:55,489 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 09:24:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 09:24:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 09:24:55,490 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:25:22,018 INFO L93 Difference]: Finished difference Result 268 states and 304 transitions. [2022-12-14 09:25:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-14 09:25:22,019 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 09:25:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:25:22,019 INFO L225 Difference]: With dead ends: 268 [2022-12-14 09:25:22,019 INFO L226 Difference]: Without dead ends: 240 [2022-12-14 09:25:22,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3261 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=1850, Invalid=9922, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 09:25:22,021 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2022 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:25:22,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2022 Valid, 398 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 09:25:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-14 09:25:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 231. [2022-12-14 09:25:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 1.1877729257641922) internal successors, (272), 230 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 272 transitions. [2022-12-14 09:25:22,027 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 272 transitions. Word has length 34 [2022-12-14 09:25:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:25:22,028 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 272 transitions. [2022-12-14 09:25:22,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 272 transitions. [2022-12-14 09:25:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 09:25:22,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:25:22,029 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:25:22,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 09:25:22,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-12-14 09:25:22,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 09:25:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:25:22,632 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:25:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:25:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash -73696953, now seen corresponding path program 2 times [2022-12-14 09:25:22,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:25:22,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730960702] [2022-12-14 09:25:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:25:22,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:25:22,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:25:22,636 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:25:22,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 09:25:22,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:25:22,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:22,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:25:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:22,771 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:25:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:23,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:25,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:25:25,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730960702] [2022-12-14 09:25:25,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730960702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:25,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [46770728] [2022-12-14 09:25:25,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:25:25,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:25:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:25:25,891 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:25:25,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 09:25:26,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:25:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:25:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:25:26,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:25:28,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [46770728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:28,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228163173] [2022-12-14 09:25:28,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:25:28,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:25:28,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:25:28,649 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:25:28,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 09:25:28,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:25:28,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 09:25:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:28,761 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:25:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:30,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:32,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228163173] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:32,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:25:32,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13, 12, 15, 14] total 59 [2022-12-14 09:25:32,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895181067] [2022-12-14 09:25:32,018 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:25:32,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 09:25:32,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:25:32,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 09:25:32,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=3078, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 09:25:32,019 INFO L87 Difference]: Start difference. First operand 231 states and 272 transitions. Second operand has 59 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 59 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:25:53,774 INFO L93 Difference]: Finished difference Result 718 states and 832 transitions. [2022-12-14 09:25:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 09:25:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 59 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 09:25:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:25:53,778 INFO L225 Difference]: With dead ends: 718 [2022-12-14 09:25:53,778 INFO L226 Difference]: Without dead ends: 716 [2022-12-14 09:25:53,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1568, Invalid=7938, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 09:25:53,780 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1605 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:25:53,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1605 Valid, 582 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-12-14 09:25:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-12-14 09:25:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 639. [2022-12-14 09:25:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 637 states have (on average 1.1821036106750393) internal successors, (753), 638 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 753 transitions. [2022-12-14 09:25:53,790 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 753 transitions. Word has length 42 [2022-12-14 09:25:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:25:53,790 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 753 transitions. [2022-12-14 09:25:53,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 59 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 753 transitions. [2022-12-14 09:25:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 09:25:53,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:25:53,792 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 09:25:53,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-12-14 09:25:54,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 09:25:54,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 09:25:54,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:25:54,395 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:25:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:25:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2022-12-14 09:25:54,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:25:54,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689735390] [2022-12-14 09:25:54,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:25:54,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:25:54,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:25:54,403 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:25:54,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 09:25:54,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 09:25:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:54,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:25:54,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:54,605 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:25:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:55,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:58,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:25:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689735390] [2022-12-14 09:25:58,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689735390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1852906647] [2022-12-14 09:25:58,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:25:58,444 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:25:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:25:58,444 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:25:58,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 09:25:59,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 09:25:59,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:59,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 09:25:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:59,108 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:25:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:59,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:26:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:26:08,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1852906647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:26:08,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490991366] [2022-12-14 09:26:08,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:26:08,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:26:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:26:08,804 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:26:08,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 09:26:13,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 09:26:13,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:26:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 09:26:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:26:13,433 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:26:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:26:14,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:26:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:26:20,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490991366] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:26:20,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:26:20,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17, 21, 19, 19] total 67 [2022-12-14 09:26:20,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481329864] [2022-12-14 09:26:20,350 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:26:20,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 09:26:20,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:26:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 09:26:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=3331, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 09:26:20,352 INFO L87 Difference]: Start difference. First operand 639 states and 753 transitions. Second operand has 68 states, 67 states have (on average 3.014925373134328) internal successors, (202), 68 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:26:28,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 09:26:34,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 09:26:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:26:54,735 INFO L93 Difference]: Finished difference Result 3879 states and 4589 transitions. [2022-12-14 09:26:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 09:26:54,737 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.014925373134328) internal successors, (202), 68 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 09:26:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:26:54,744 INFO L225 Difference]: With dead ends: 3879 [2022-12-14 09:26:54,744 INFO L226 Difference]: Without dead ends: 3879 [2022-12-14 09:26:54,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3513 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=2618, Invalid=6502, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 09:26:54,746 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 3418 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3418 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:26:54,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3418 Valid, 1842 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2364 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-12-14 09:26:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2022-12-14 09:26:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 687. [2022-12-14 09:26:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 685 states have (on average 1.186861313868613) internal successors, (813), 686 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:26:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 813 transitions. [2022-12-14 09:26:54,772 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 813 transitions. Word has length 46 [2022-12-14 09:26:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:26:54,772 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 813 transitions. [2022-12-14 09:26:54,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.014925373134328) internal successors, (202), 68 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:26:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 813 transitions. [2022-12-14 09:26:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:26:54,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:26:54,774 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:26:54,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-12-14 09:26:54,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-14 09:26:55,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-14 09:26:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:26:55,375 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:26:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:26:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash -917791020, now seen corresponding path program 2 times [2022-12-14 09:26:55,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:26:55,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254564779] [2022-12-14 09:26:55,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:26:55,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:26:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:26:55,378 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:26:55,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 09:26:55,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:26:55,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:26:55,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:26:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:26:55,505 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:26:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 09:26:56,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:26:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 09:26:57,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:26:57,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254564779] [2022-12-14 09:26:57,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254564779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:26:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1850994397] [2022-12-14 09:26:57,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:26:57,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:26:57,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:26:57,892 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:26:57,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 09:26:58,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:26:58,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:26:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:26:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:26:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:26:58,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:27:00,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1850994397] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:00,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488349492] [2022-12-14 09:27:00,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:27:00,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:00,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:00,578 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:00,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 09:27:00,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:27:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:27:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 09:27:02,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 09:27:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488349492] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:04,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:27:04,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 14, 13, 14, 12] total 64 [2022-12-14 09:27:04,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754298930] [2022-12-14 09:27:04,809 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:27:04,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 09:27:04,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:27:04,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 09:27:04,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=3677, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 09:27:04,813 INFO L87 Difference]: Start difference. First operand 687 states and 813 transitions. Second operand has 64 states, 64 states have (on average 3.4375) internal successors, (220), 64 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:41,602 INFO L93 Difference]: Finished difference Result 1222 states and 1409 transitions. [2022-12-14 09:27:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-14 09:27:41,603 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.4375) internal successors, (220), 64 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 09:27:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:41,605 INFO L225 Difference]: With dead ends: 1222 [2022-12-14 09:27:41,605 INFO L226 Difference]: Without dead ends: 1183 [2022-12-14 09:27:41,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5868 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=2896, Invalid=19156, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 09:27:41,611 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2559 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2723 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2559 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:41,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2559 Valid, 1022 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2723 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-12-14 09:27:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-12-14 09:27:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 649. [2022-12-14 09:27:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 647 states have (on average 1.1561051004636784) internal successors, (748), 648 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 748 transitions. [2022-12-14 09:27:41,621 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 748 transitions. Word has length 49 [2022-12-14 09:27:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:41,621 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 748 transitions. [2022-12-14 09:27:41,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.4375) internal successors, (220), 64 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 748 transitions. [2022-12-14 09:27:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:27:41,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:41,622 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:41,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-14 09:27:41,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 09:27:42,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 09:27:42,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:42,225 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:27:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash -557992115, now seen corresponding path program 3 times [2022-12-14 09:27:42,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:27:42,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779679998] [2022-12-14 09:27:42,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:27:42,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:27:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:27:42,228 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:27:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 09:27:42,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 09:27:42,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 09:27:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:42,497 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:27:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:27:43,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:27:47,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:27:47,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779679998] [2022-12-14 09:27:47,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779679998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:47,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [542134239] [2022-12-14 09:27:47,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:27:47,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:27:47,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:27:47,277 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:27:47,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 09:27:48,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 09:27:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:48,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 09:27:48,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:48,570 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:27:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:27:49,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:27:56,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [542134239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:56,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968487555] [2022-12-14 09:27:56,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:27:56,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:56,658 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 09:27:56,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 09:27:56,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:27:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:56,881 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:27:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:27:57,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:28:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:28:01,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968487555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:28:01,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:28:01,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12, 15, 11, 12] total 43 [2022-12-14 09:28:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020620264] [2022-12-14 09:28:01,854 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:28:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 09:28:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:28:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 09:28:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 09:28:01,856 INFO L87 Difference]: Start difference. First operand 649 states and 748 transitions. Second operand has 44 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 44 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:28:46,160 INFO L93 Difference]: Finished difference Result 806 states and 927 transitions. [2022-12-14 09:28:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 09:28:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 44 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 09:28:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:28:46,163 INFO L225 Difference]: With dead ends: 806 [2022-12-14 09:28:46,163 INFO L226 Difference]: Without dead ends: 806 [2022-12-14 09:28:46,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 246 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=2350, Invalid=7352, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 09:28:46,164 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1246 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:28:46,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 379 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-12-14 09:28:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-12-14 09:28:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 783. [2022-12-14 09:28:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 781 states have (on average 1.1613316261203586) internal successors, (907), 782 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 907 transitions. [2022-12-14 09:28:46,175 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 907 transitions. Word has length 50 [2022-12-14 09:28:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:28:46,175 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 907 transitions. [2022-12-14 09:28:46,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 44 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 907 transitions. [2022-12-14 09:28:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 09:28:46,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:28:46,176 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:28:46,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 09:28:46,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-12-14 09:28:46,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 09:28:46,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:28:46,778 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:28:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:28:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -273652577, now seen corresponding path program 3 times [2022-12-14 09:28:46,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:28:46,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214513978] [2022-12-14 09:28:46,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:28:46,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:28:46,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:28:46,782 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:28:46,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 09:28:47,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:28:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:28:47,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:28:47,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:28:47,024 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:28:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 09:28:47,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:28:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 09:28:51,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:28:51,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214513978] [2022-12-14 09:28:51,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214513978] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:28:51,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [475136208] [2022-12-14 09:28:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:28:51,435 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:28:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:28:51,436 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:28:51,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 09:28:52,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:28:52,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:28:52,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 09:28:52,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:28:52,817 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:28:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 17 proven. 101 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 09:28:55,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 09:29:06,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [475136208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:06,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206634285] [2022-12-14 09:29:06,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:29:06,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:06,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:06,280 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:29:06,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 09:29:06,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:29:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:29:06,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 09:29:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:06,493 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:29:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 09:29:07,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 09:29:12,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206634285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:12,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:29:12,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15, 17, 11, 12] total 49 [2022-12-14 09:29:12,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292017278] [2022-12-14 09:29:12,211 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:29:12,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:29:12,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:29:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2071, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 09:29:12,213 INFO L87 Difference]: Start difference. First operand 783 states and 907 transitions. Second operand has 50 states, 49 states have (on average 3.122448979591837) internal successors, (153), 50 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:30:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:11,810 INFO L93 Difference]: Finished difference Result 1035 states and 1194 transitions. [2022-12-14 09:30:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-14 09:30:11,810 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.122448979591837) internal successors, (153), 50 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-14 09:30:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:11,815 INFO L225 Difference]: With dead ends: 1035 [2022-12-14 09:30:11,815 INFO L226 Difference]: Without dead ends: 1035 [2022-12-14 09:30:11,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 346 SyntacticMatches, 8 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=2674, Invalid=9098, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 09:30:11,817 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1282 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:11,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 303 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-12-14 09:30:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-12-14 09:30:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 888. [2022-12-14 09:30:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 886 states have (on average 1.164785553047404) internal successors, (1032), 887 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:30:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1032 transitions. [2022-12-14 09:30:11,830 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1032 transitions. Word has length 68 [2022-12-14 09:30:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:11,830 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1032 transitions. [2022-12-14 09:30:11,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.122448979591837) internal successors, (153), 50 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:30:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1032 transitions. [2022-12-14 09:30:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 09:30:11,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:11,831 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:11,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-12-14 09:30:12,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-14 09:30:12,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 09:30:12,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:30:12,433 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:30:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2060965005, now seen corresponding path program 4 times [2022-12-14 09:30:12,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:12,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293786260] [2022-12-14 09:30:12,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:30:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:12,439 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:12,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 09:30:12,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:30:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:30:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:30:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:12,697 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:30:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:30:13,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:19,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:19,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293786260] [2022-12-14 09:30:19,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293786260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:30:19,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1048170814] [2022-12-14 09:30:19,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:30:19,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:30:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:30:19,047 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:30:19,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 09:30:19,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:30:19,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:30:19,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:30:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 134 proven. 79 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 09:30:21,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 134 proven. 79 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 09:30:25,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1048170814] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:30:25,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388624539] [2022-12-14 09:30:25,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:30:25,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:30:25,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:30:25,097 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:30:25,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 09:30:25,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:30:25,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:30:25,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:30:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:25,280 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:30:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:30:27,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 138 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:30:32,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388624539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:30:32,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:30:32,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 18, 16, 19, 18] total 95 [2022-12-14 09:30:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659357926] [2022-12-14 09:30:32,447 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:30:32,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-12-14 09:30:32,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:32,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-12-14 09:30:32,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=8216, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 09:30:32,451 INFO L87 Difference]: Start difference. First operand 888 states and 1032 transitions. Second operand has 95 states, 95 states have (on average 3.4947368421052634) internal successors, (332), 95 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:31:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:34,063 INFO L93 Difference]: Finished difference Result 1281 states and 1462 transitions. [2022-12-14 09:31:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-14 09:31:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.4947368421052634) internal successors, (332), 95 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-12-14 09:31:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:34,065 INFO L225 Difference]: With dead ends: 1281 [2022-12-14 09:31:34,066 INFO L226 Difference]: Without dead ends: 1195 [2022-12-14 09:31:34,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7967 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=4993, Invalid=25109, Unknown=0, NotChecked=0, Total=30102 [2022-12-14 09:31:34,067 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 3692 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 5741 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3692 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 5842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 5741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:34,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3692 Valid, 2141 Invalid, 5842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 5741 Invalid, 0 Unknown, 0 Unchecked, 20.9s Time] [2022-12-14 09:31:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-12-14 09:31:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1111. [2022-12-14 09:31:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1109 states have (on average 1.151487826871055) internal successors, (1277), 1110 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:31:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1277 transitions. [2022-12-14 09:31:34,080 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1277 transitions. Word has length 80 [2022-12-14 09:31:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:34,080 INFO L495 AbstractCegarLoop]: Abstraction has 1111 states and 1277 transitions. [2022-12-14 09:31:34,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.4947368421052634) internal successors, (332), 95 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:31:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1277 transitions. [2022-12-14 09:31:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 09:31:34,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:34,081 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:34,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 09:31:34,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-12-14 09:31:34,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 09:31:34,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:31:34,684 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:31:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1807772298, now seen corresponding path program 4 times [2022-12-14 09:31:34,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:31:34,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901937721] [2022-12-14 09:31:34,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:31:34,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:31:34,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:31:34,689 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:31:34,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-14 09:31:34,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:31:34,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:31:34,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:31:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:31:34,941 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:31:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 4 proven. 303 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 09:31:36,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:31:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 24 proven. 283 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 09:31:39,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:31:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901937721] [2022-12-14 09:31:39,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901937721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:31:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [834377967] [2022-12-14 09:31:39,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:31:39,839 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:31:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:31:39,840 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:31:39,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 09:31:40,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:31:40,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:31:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:31:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:31:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 172 proven. 103 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 09:31:41,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:31:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 172 proven. 103 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 09:31:43,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [834377967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:31:43,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391723980] [2022-12-14 09:31:43,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:31:43,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:31:43,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:31:43,574 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:31:43,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 09:31:43,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:31:43,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:31:43,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:31:43,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:31:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 172 proven. 82 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 09:31:44,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:31:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 243 proven. 29 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 09:31:48,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391723980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:31:48,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:31:48,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15, 14, 13, 14] total 75 [2022-12-14 09:31:48,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563582820] [2022-12-14 09:31:48,255 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:31:48,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-14 09:31:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:31:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-14 09:31:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5050, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 09:31:48,256 INFO L87 Difference]: Start difference. First operand 1111 states and 1277 transitions. Second operand has 75 states, 75 states have (on average 3.8) internal successors, (285), 75 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:34:10,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:34:10,809 INFO L93 Difference]: Finished difference Result 2109 states and 2361 transitions. [2022-12-14 09:34:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-12-14 09:34:10,810 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.8) internal successors, (285), 75 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-12-14 09:34:10,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:34:10,812 INFO L225 Difference]: With dead ends: 2109 [2022-12-14 09:34:10,812 INFO L226 Difference]: Without dead ends: 1734 [2022-12-14 09:34:10,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 503 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18272 ImplicationChecksByTransitivity, 131.9s TimeCoverageRelationStatistics Valid=6693, Invalid=52113, Unknown=0, NotChecked=0, Total=58806 [2022-12-14 09:34:10,816 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 10258 mSDsluCounter, 2397 mSDsCounter, 0 mSdLazyCounter, 6188 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10258 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 6546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 6188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:34:10,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10258 Valid, 2505 Invalid, 6546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 6188 Invalid, 0 Unknown, 0 Unchecked, 19.7s Time] [2022-12-14 09:34:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-12-14 09:34:10,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1429. [2022-12-14 09:34:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1427 states have (on average 1.1317449194113525) internal successors, (1615), 1428 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:34:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1615 transitions. [2022-12-14 09:34:10,835 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1615 transitions. Word has length 88 [2022-12-14 09:34:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:34:10,836 INFO L495 AbstractCegarLoop]: Abstraction has 1429 states and 1615 transitions. [2022-12-14 09:34:10,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.8) internal successors, (285), 75 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:34:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1615 transitions. [2022-12-14 09:34:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 09:34:10,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:34:10,837 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:34:10,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-14 09:34:11,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-12-14 09:34:11,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-12-14 09:34:11,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:34:11,440 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 09:34:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:34:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1987259542, now seen corresponding path program 5 times [2022-12-14 09:34:11,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:34:11,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862952526] [2022-12-14 09:34:11,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 09:34:11,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:34:11,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:34:11,445 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:34:11,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 09:34:12,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-14 09:34:12,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:34:12,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 09:34:12,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:34:12,481 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:34:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 86 proven. 284 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 09:34:14,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:34:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:34:24,587 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:34:24,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862952526] [2022-12-14 09:34:24,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862952526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:34:24,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [348775677] [2022-12-14 09:34:24,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 09:34:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:34:24,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:34:24,588 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:34:24,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0ce279-abd7-4f0d-a3bb-554fe13bc397/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process