./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW --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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- 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-4e7fbc6 [2022-11-23 13:52:16,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:52:16,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:52:16,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:52:16,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:52:16,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:52:16,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:52:16,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:52:16,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:52:16,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:52:16,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:52:16,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:52:16,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:52:16,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:52:16,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:52:16,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:52:16,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:52:16,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:52:16,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:52:16,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:52:16,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:52:16,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:52:16,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:52:16,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:52:16,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:52:16,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:52:16,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:52:16,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:52:16,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:52:16,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:52:16,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:52:16,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:52:16,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:52:16,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:52:16,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:52:16,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:52:16,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:52:16,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:52:16,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:52:16,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:52:16,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:52:16,481 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 13:52:16,517 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:52:16,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:52:16,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:52:16,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:52:16,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:52:16,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:52:16,519 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:52:16,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:52:16,520 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:52:16,520 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:52:16,520 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:52:16,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:52:16,520 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:52:16,521 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:52:16,521 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:52:16,521 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:52:16,521 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:52:16,521 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:52:16,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 13:52:16,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 13:52:16,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:52:16,523 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:52:16,523 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 13:52:16,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:52:16,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:52:16,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:52:16,524 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 13:52:16,524 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 13:52:16,524 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 13:52:16,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:52:16,525 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:52:16,525 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:52:16,525 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:52:16,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:52:16,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:52:16,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:52:16,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:52:16,526 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:52:16,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:52:16,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:52:16,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:52:16,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:52:16,535 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_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2022-11-23 13:52:16,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:52:16,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:52:16,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:52:16,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:52:16,835 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:52:16,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-11-23 13:52:19,978 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:52:20,298 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:52:20,299 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-11-23 13:52:20,314 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/data/d1dceb0ab/04f0224240df48b0beb2e1e7987f3916/FLAGbf005826b [2022-11-23 13:52:20,341 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/data/d1dceb0ab/04f0224240df48b0beb2e1e7987f3916 [2022-11-23 13:52:20,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:52:20,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:52:20,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:52:20,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:52:20,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:52:20,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:20" (1/1) ... [2022-11-23 13:52:20,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38fc787c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:20, skipping insertion in model container [2022-11-23 13:52:20,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:20" (1/1) ... [2022-11-23 13:52:20,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:52:20,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:52:20,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:52:20,944 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) [2022-11-23 13:52:20,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bab14d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:20, skipping insertion in model container [2022-11-23 13:52:20,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:52:20,946 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 13:52:20,948 INFO L158 Benchmark]: Toolchain (without parser) took 598.20ms. Allocated memory is still 161.5MB. Free memory was 128.8MB in the beginning and 114.2MB in the end (delta: 14.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 13:52:20,949 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 161.5MB. Free memory is still 130.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 13:52:20,950 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.45ms. Allocated memory is still 161.5MB. Free memory was 128.2MB in the beginning and 114.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 13:52:20,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 161.5MB. Free memory is still 130.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 593.45ms. Allocated memory is still 161.5MB. Free memory was 128.2MB in the beginning and 114.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW --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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- 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-4e7fbc6 [2022-11-23 13:52:23,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:52:23,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:52:23,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:52:23,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:52:23,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:52:23,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:52:23,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:52:23,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:52:23,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:52:23,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:52:23,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:52:23,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:52:23,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:52:23,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:52:23,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:52:23,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:52:23,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:52:23,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:52:23,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:52:23,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:52:23,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:52:23,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:52:23,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:52:23,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:52:23,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:52:23,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:52:23,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:52:23,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:52:23,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:52:23,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:52:23,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:52:23,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:52:23,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:52:23,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:52:23,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:52:23,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:52:23,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:52:23,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:52:23,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:52:23,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:52:23,516 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 13:52:23,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:52:23,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:52:23,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:52:23,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:52:23,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:52:23,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:52:23,567 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:52:23,567 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:52:23,567 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:52:23,568 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:52:23,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:52:23,569 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:52:23,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 13:52:23,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 13:52:23,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:52:23,571 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:52:23,572 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 13:52:23,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:52:23,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:52:23,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:52:23,573 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 13:52:23,573 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 13:52:23,573 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 13:52:23,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:52:23,574 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:52:23,574 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 13:52:23,575 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 13:52:23,575 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:52:23,575 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:52:23,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:52:23,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 13:52:23,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:52:23,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:52:23,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:52:23,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:52:23,578 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 13:52:23,578 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 13:52:23,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:52:23,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 13:52:23,579 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_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2022-11-23 13:52:23,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:52:24,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:52:24,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:52:24,037 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:52:24,038 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:52:24,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-11-23 13:52:27,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:52:27,842 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:52:27,843 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-11-23 13:52:27,855 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/data/5e4dae2cd/1fc4790ccd7e4fcd9f053a621b690193/FLAG065de4f33 [2022-11-23 13:52:27,875 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/data/5e4dae2cd/1fc4790ccd7e4fcd9f053a621b690193 [2022-11-23 13:52:27,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:52:27,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:52:27,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:52:27,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:52:27,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:52:27,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:27" (1/1) ... [2022-11-23 13:52:27,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310df85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:27, skipping insertion in model container [2022-11-23 13:52:27,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:27" (1/1) ... [2022-11-23 13:52:27,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:52:27,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:52:28,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:52:28,465 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 13:52:28,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:52:28,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:52:28,535 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:52:28,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:52:28,621 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:52:28,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28 WrapperNode [2022-11-23 13:52:28,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:52:28,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:52:28,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:52:28,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:52:28,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,683 INFO L138 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 99 [2022-11-23 13:52:28,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:52:28,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:52:28,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:52:28,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:52:28,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,721 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:52:28,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:52:28,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:52:28,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:52:28,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (1/1) ... [2022-11-23 13:52:28,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:52:28,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:28,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:52:28,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:52:28,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 13:52:28,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 13:52:28,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:52:28,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:52:28,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 13:52:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 13:52:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:52:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 13:52:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:52:28,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:52:28,959 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:52:28,961 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:52:29,396 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:52:29,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:52:29,413 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 13:52:29,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:29 BoogieIcfgContainer [2022-11-23 13:52:29,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:52:29,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:52:29,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:52:29,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:52:29,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:52:27" (1/3) ... [2022-11-23 13:52:29,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f91d628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:29, skipping insertion in model container [2022-11-23 13:52:29,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:28" (2/3) ... [2022-11-23 13:52:29,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f91d628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:29, skipping insertion in model container [2022-11-23 13:52:29,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:29" (3/3) ... [2022-11-23 13:52:29,428 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2022-11-23 13:52:29,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:52:29,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-23 13:52:29,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:52:29,526 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;@3c54a75f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:52:29,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-23 13:52:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:52:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:52:29,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:29,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:29,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 858994893, now seen corresponding path program 1 times [2022-11-23 13:52:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:29,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145729111] [2022-11-23 13:52:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:29,585 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 [2022-11-23 13:52:29,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:29,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:29,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:29,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 13:52:29,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:29,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:52:29,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145729111] [2022-11-23 13:52:29,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145729111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:29,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:29,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:52:29,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882501163] [2022-11-23 13:52:29,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:29,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 13:52:29,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:29,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 13:52:29,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:52:29,856 INFO L87 Difference]: Start difference. First operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:29,894 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-11-23 13:52:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 13:52:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-23 13:52:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:29,912 INFO L225 Difference]: With dead ends: 67 [2022-11-23 13:52:29,913 INFO L226 Difference]: Without dead ends: 65 [2022-11-23 13:52:29,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:52:29,926 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:29,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:52:29,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-23 13:52:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-23 13:52:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:52:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-11-23 13:52:29,983 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 14 [2022-11-23 13:52:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:29,984 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-11-23 13:52:29,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-11-23 13:52:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:52:29,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:29,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:30,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Ended with exit code 0 [2022-11-23 13:52:30,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:30,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:30,199 INFO L85 PathProgramCache]: Analyzing trace with hash 465967883, now seen corresponding path program 1 times [2022-11-23 13:52:30,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:30,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500305579] [2022-11-23 13:52:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:30,200 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 [2022-11-23 13:52:30,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:30,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:30,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:52:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:30,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:52:30,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500305579] [2022-11-23 13:52:30,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500305579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:30,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:30,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:52:30,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835324959] [2022-11-23 13:52:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:30,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:52:30,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:52:30,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:52:30,380 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:30,508 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2022-11-23 13:52:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:52:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-23 13:52:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:30,512 INFO L225 Difference]: With dead ends: 121 [2022-11-23 13:52:30,512 INFO L226 Difference]: Without dead ends: 121 [2022-11-23 13:52:30,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:52:30,514 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:30,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 249 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:52:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-23 13:52:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2022-11-23 13:52:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 13:52:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-11-23 13:52:30,525 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2022-11-23 13:52:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:30,525 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-11-23 13:52:30,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-11-23 13:52:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:52:30,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:30,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:30,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:30,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:30,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:30,728 INFO L85 PathProgramCache]: Analyzing trace with hash 465866789, now seen corresponding path program 1 times [2022-11-23 13:52:30,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:30,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59856415] [2022-11-23 13:52:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:30,729 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 [2022-11-23 13:52:30,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:30,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:30,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 13:52:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:30,880 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 [2022-11-23 13:52:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:30,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:52:30,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:30,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59856415] [2022-11-23 13:52:30,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59856415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:30,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:30,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:52:30,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508351419] [2022-11-23 13:52:30,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:30,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:52:30,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:52:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:52:30,927 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:31,127 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-11-23 13:52:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:52:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-23 13:52:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:31,130 INFO L225 Difference]: With dead ends: 93 [2022-11-23 13:52:31,130 INFO L226 Difference]: Without dead ends: 93 [2022-11-23 13:52:31,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:52:31,131 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:31,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:52:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-23 13:52:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2022-11-23 13:52:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 13:52:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-11-23 13:52:31,141 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 14 [2022-11-23 13:52:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:31,142 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-11-23 13:52:31,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-11-23 13:52:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:52:31,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:31,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:31,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:31,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:31,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:31,358 INFO L85 PathProgramCache]: Analyzing trace with hash 465866790, now seen corresponding path program 1 times [2022-11-23 13:52:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:31,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742658040] [2022-11-23 13:52:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:31,359 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 [2022-11-23 13:52:31,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:31,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:31,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:31,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 13:52:31,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:31,528 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 [2022-11-23 13:52:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:31,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:52:31,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:31,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742658040] [2022-11-23 13:52:31,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742658040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:31,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:31,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 13:52:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865253750] [2022-11-23 13:52:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 13:52:31,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 13:52:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:52:31,837 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:32,622 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2022-11-23 13:52:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 13:52:32,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-23 13:52:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:32,624 INFO L225 Difference]: With dead ends: 117 [2022-11-23 13:52:32,624 INFO L226 Difference]: Without dead ends: 117 [2022-11-23 13:52:32,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:52:32,625 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 227 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:32,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 429 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:52:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-23 13:52:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-11-23 13:52:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5657894736842106) internal successors, (119), 95 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 13:52:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-11-23 13:52:32,636 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 14 [2022-11-23 13:52:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:32,637 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-11-23 13:52:32,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-11-23 13:52:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:52:32,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:32,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:32,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:32,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:32,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1353471564, now seen corresponding path program 1 times [2022-11-23 13:52:32,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:32,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126437290] [2022-11-23 13:52:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:32,851 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 [2022-11-23 13:52:32,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:32,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:32,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (6)] Waiting until timeout for monitored process [2022-11-23 13:52:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:52:32,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:32,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:52:32,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:32,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126437290] [2022-11-23 13:52:32,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126437290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:32,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:32,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:52:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815699073] [2022-11-23 13:52:32,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:32,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:52:32,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:52:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:32,945 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:33,080 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2022-11-23 13:52:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:52:33,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-23 13:52:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:33,083 INFO L225 Difference]: With dead ends: 144 [2022-11-23 13:52:33,083 INFO L226 Difference]: Without dead ends: 142 [2022-11-23 13:52:33,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:33,084 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:33,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:52:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-23 13:52:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2022-11-23 13:52:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5526315789473684) internal successors, (118), 95 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 13:52:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-11-23 13:52:33,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 14 [2022-11-23 13:52:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:33,095 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-11-23 13:52:33,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-11-23 13:52:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:52:33,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:33,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:33,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (6)] Ended with exit code 0 [2022-11-23 13:52:33,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:33,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1353370470, now seen corresponding path program 1 times [2022-11-23 13:52:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986910536] [2022-11-23 13:52:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:33,309 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 [2022-11-23 13:52:33,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:33,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:33,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Waiting until timeout for monitored process [2022-11-23 13:52:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:52:33,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:33,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:52:33,441 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:33,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986910536] [2022-11-23 13:52:33,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986910536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:33,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:33,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:52:33,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051938205] [2022-11-23 13:52:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:33,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:52:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:52:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:52:33,443 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:33,493 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2022-11-23 13:52:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:52:33,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-23 13:52:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:33,495 INFO L225 Difference]: With dead ends: 86 [2022-11-23 13:52:33,495 INFO L226 Difference]: Without dead ends: 84 [2022-11-23 13:52:33,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:52:33,496 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:33,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 275 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:52:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-23 13:52:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-23 13:52:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:52:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-11-23 13:52:33,509 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 14 [2022-11-23 13:52:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:33,509 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-11-23 13:52:33,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-11-23 13:52:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 13:52:33,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:33,510 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:33,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:33,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:33,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1598186502, now seen corresponding path program 1 times [2022-11-23 13:52:33,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:33,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278802304] [2022-11-23 13:52:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:33,730 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 [2022-11-23 13:52:33,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:33,731 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:33,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 13:52:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:33,860 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 [2022-11-23 13:52:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:34,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:35,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278802304] [2022-11-23 13:52:35,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278802304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:35,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [661678344] [2022-11-23 13:52:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:35,845 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:52:35,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:52:35,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:52:35,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-23 13:52:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:52:35,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:36,016 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 [2022-11-23 13:52:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:36,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:36,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [661678344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:36,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656826954] [2022-11-23 13:52:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:36,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:36,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:52:36,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 13:52:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:36,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:52:36,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:36,798 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 [2022-11-23 13:52:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:36,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:37,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656826954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:37,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:52:37,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 9, 11, 9] total 20 [2022-11-23 13:52:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773150188] [2022-11-23 13:52:37,435 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:52:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:52:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:52:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-11-23 13:52:37,437 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:52:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:41,111 INFO L93 Difference]: Finished difference Result 138 states and 159 transitions. [2022-11-23 13:52:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 13:52:41,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-23 13:52:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:41,113 INFO L225 Difference]: With dead ends: 138 [2022-11-23 13:52:41,114 INFO L226 Difference]: Without dead ends: 138 [2022-11-23 13:52:41,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 13:52:41,115 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 585 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:41,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 501 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 13:52:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-23 13:52:41,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2022-11-23 13:52:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 89 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:52:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-11-23 13:52:41,122 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 17 [2022-11-23 13:52:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:41,122 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-11-23 13:52:41,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:52:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-11-23 13:52:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 13:52:41,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:41,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:41,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:41,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:41,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 13:52:41,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:41,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash 740047555, now seen corresponding path program 1 times [2022-11-23 13:52:41,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:41,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320729611] [2022-11-23 13:52:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:41,731 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 [2022-11-23 13:52:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:41,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:41,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:52:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:41,832 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 [2022-11-23 13:52:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:52:41,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:52:41,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320729611] [2022-11-23 13:52:41,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320729611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:41,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:41,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:52:41,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607171917] [2022-11-23 13:52:41,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:41,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:52:41,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:52:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:52:41,898 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:42,110 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-11-23 13:52:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:52:42,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-23 13:52:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:42,112 INFO L225 Difference]: With dead ends: 103 [2022-11-23 13:52:42,112 INFO L226 Difference]: Without dead ends: 103 [2022-11-23 13:52:42,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:52:42,113 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:42,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 218 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:52:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-23 13:52:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-11-23 13:52:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.5352112676056338) internal successors, (109), 90 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:52:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2022-11-23 13:52:42,120 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 22 [2022-11-23 13:52:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:42,120 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2022-11-23 13:52:42,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2022-11-23 13:52:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 13:52:42,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:42,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:42,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:42,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:42,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:42,333 INFO L85 PathProgramCache]: Analyzing trace with hash 740047556, now seen corresponding path program 1 times [2022-11-23 13:52:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:42,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262707128] [2022-11-23 13:52:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:42,333 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 [2022-11-23 13:52:42,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:42,335 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:42,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:42,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 13:52:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:42,472 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 [2022-11-23 13:52:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:42,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:43,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:43,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262707128] [2022-11-23 13:52:43,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262707128] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 13:52:43,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:52:43,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2022-11-23 13:52:43,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511912994] [2022-11-23 13:52:43,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:43,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:52:43,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:43,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:52:43,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:52:43,947 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:45,688 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2022-11-23 13:52:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 13:52:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-23 13:52:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:45,691 INFO L225 Difference]: With dead ends: 151 [2022-11-23 13:52:45,691 INFO L226 Difference]: Without dead ends: 151 [2022-11-23 13:52:45,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:52:45,692 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 157 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:45,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 276 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 13:52:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-23 13:52:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2022-11-23 13:52:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 90 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:52:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-11-23 13:52:45,698 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 22 [2022-11-23 13:52:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:45,698 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-11-23 13:52:45,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:52:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-11-23 13:52:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 13:52:45,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:45,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:45,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:45,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:45,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637803, now seen corresponding path program 1 times [2022-11-23 13:52:45,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:45,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904998981] [2022-11-23 13:52:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:45,909 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 [2022-11-23 13:52:45,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:45,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:45,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:45,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:52:46,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:46,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:52:46,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:52:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:46,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:46,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 13:52:46,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 13:52:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:46,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:46,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904998981] [2022-11-23 13:52:46,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904998981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:46,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926501408] [2022-11-23 13:52:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:46,184 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:52:46,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:52:46,185 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:52:46,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-23 13:52:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:52:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:46,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:46,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926501408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:46,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403761195] [2022-11-23 13:52:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:46,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:46,795 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:52:46,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 13:52:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:46,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:52:46,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:46,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:52:47,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403761195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:47,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:52:47,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9, 7, 9, 7] total 19 [2022-11-23 13:52:47,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304299742] [2022-11-23 13:52:47,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:52:47,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 13:52:47,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:47,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 13:52:47,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-23 13:52:47,032 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:52:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:48,954 INFO L93 Difference]: Finished difference Result 300 states and 323 transitions. [2022-11-23 13:52:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 13:52:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-23 13:52:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:48,956 INFO L225 Difference]: With dead ends: 300 [2022-11-23 13:52:48,956 INFO L226 Difference]: Without dead ends: 300 [2022-11-23 13:52:48,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=451, Invalid=1271, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 13:52:48,958 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1553 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:48,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1553 Valid, 489 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 13:52:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-23 13:52:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 94. [2022-11-23 13:52:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 89 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 13:52:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-11-23 13:52:48,975 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 23 [2022-11-23 13:52:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:48,976 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-11-23 13:52:48,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:52:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-11-23 13:52:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 13:52:48,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:48,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:48,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:49,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:49,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:49,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:49,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash -878858933, now seen corresponding path program 1 times [2022-11-23 13:52:49,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:49,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106086163] [2022-11-23 13:52:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:49,581 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 [2022-11-23 13:52:49,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:49,582 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:49,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:52:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:49,680 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 [2022-11-23 13:52:49,755 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-23 13:52:49,787 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:52:49,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:52:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-23 13:52:49,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:52:50,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:50,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106086163] [2022-11-23 13:52:50,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106086163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:50,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1975394652] [2022-11-23 13:52:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:50,039 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:52:50,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:52:50,052 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:52:50,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-23 13:52:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:52:50,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:50,257 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 [2022-11-23 13:52:50,309 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_111 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_111))))) is different from true [2022-11-23 13:52:50,353 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:52:50,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 13:52:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-23 13:52:50,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:52:50,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1975394652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:50,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657432490] [2022-11-23 13:52:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:50,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:50,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:50,548 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:52:50,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 13:52:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:52:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:50,643 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 [2022-11-23 13:52:50,685 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_127 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_127))))) is different from true [2022-11-23 13:52:50,720 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:52:50,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 13:52:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-23 13:52:50,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:52:50,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657432490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:50,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:52:50,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 10 [2022-11-23 13:52:50,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641211338] [2022-11-23 13:52:50,917 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:52:50,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 13:52:50,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 13:52:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=45, Unknown=3, NotChecked=42, Total=110 [2022-11-23 13:52:50,918 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:52:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:51,310 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2022-11-23 13:52:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:52:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2022-11-23 13:52:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:51,312 INFO L225 Difference]: With dead ends: 146 [2022-11-23 13:52:51,312 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 13:52:51,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=71, Unknown=3, NotChecked=54, Total=156 [2022-11-23 13:52:51,313 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 101 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:51,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 268 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 189 Invalid, 0 Unknown, 210 Unchecked, 0.3s Time] [2022-11-23 13:52:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 13:52:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2022-11-23 13:52:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.524390243902439) internal successors, (125), 99 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 13:52:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2022-11-23 13:52:51,319 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 26 [2022-11-23 13:52:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:51,324 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2022-11-23 13:52:51,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:52:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2022-11-23 13:52:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 13:52:51,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:51,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:52:51,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:51,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:51,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:52:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:51,932 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:52:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -878858932, now seen corresponding path program 1 times [2022-11-23 13:52:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:52:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732924717] [2022-11-23 13:52:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:51,933 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 [2022-11-23 13:52:51,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:52:51,934 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:52:51,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:52:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 13:52:52,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:52,087 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 [2022-11-23 13:52:52,572 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2022-11-23 13:52:52,613 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 13:52:52,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:52:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 13:52:52,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:53,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:52:53,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732924717] [2022-11-23 13:52:53,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732924717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:52:53,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592105255] [2022-11-23 13:52:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:53,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:52:53,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:52:53,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:52:53,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-23 13:52:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:53,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 13:52:53,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:53,377 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 [2022-11-23 13:52:53,386 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 6 treesize of output 7 [2022-11-23 13:52:54,151 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_157 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_157) |c_#length|)))) is different from true [2022-11-23 13:52:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:54,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:52:54,199 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:52:54,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:52:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 13:52:54,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:56,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592105255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:52:56,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400748606] [2022-11-23 13:52:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:56,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:52:56,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:56,711 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:52:56,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 13:52:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 13:52:56,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:52:56,824 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 [2022-11-23 13:52:56,833 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 [2022-11-23 13:52:57,080 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_173 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_173))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 13:52:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:57,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:52:57,137 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:52:57,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:52:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 13:52:57,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:57,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400748606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:52:57,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:52:57,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-11-23 13:52:57,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330829814] [2022-11-23 13:52:57,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:52:57,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 13:52:57,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:52:57,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 13:52:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=565, Unknown=3, NotChecked=150, Total=812 [2022-11-23 13:52:57,598 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 13:53:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:01,181 INFO L93 Difference]: Finished difference Result 391 states and 470 transitions. [2022-11-23 13:53:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 13:53:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2022-11-23 13:53:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:01,184 INFO L225 Difference]: With dead ends: 391 [2022-11-23 13:53:01,184 INFO L226 Difference]: Without dead ends: 391 [2022-11-23 13:53:01,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=254, Invalid=1315, Unknown=3, NotChecked=234, Total=1806 [2022-11-23 13:53:01,186 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 829 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:01,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 927 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1169 Invalid, 0 Unknown, 615 Unchecked, 2.6s Time] [2022-11-23 13:53:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-23 13:53:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 155. [2022-11-23 13:53:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 129 states have (on average 1.5348837209302326) internal successors, (198), 145 states have internal predecessors, (198), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:53:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 218 transitions. [2022-11-23 13:53:01,195 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 218 transitions. Word has length 26 [2022-11-23 13:53:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:01,196 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 218 transitions. [2022-11-23 13:53:01,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 13:53:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 218 transitions. [2022-11-23 13:53:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 13:53:01,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:01,197 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:01,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:01,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:01,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-23 13:53:01,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:01,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:53:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash 245332006, now seen corresponding path program 2 times [2022-11-23 13:53:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:53:01,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918318276] [2022-11-23 13:53:01,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:53:01,810 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 [2022-11-23 13:53:01,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:53:01,811 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:53:01,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:53:01,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:53:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:53:01,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 13:53:01,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:01,955 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 [2022-11-23 13:53:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:02,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:05,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:53:05,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918318276] [2022-11-23 13:53:05,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918318276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:05,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159176860] [2022-11-23 13:53:05,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:53:05,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:53:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:53:05,760 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:53:05,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-23 13:53:05,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:53:05,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:53:05,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 13:53:05,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:05,954 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 [2022-11-23 13:53:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:06,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:07,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159176860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:07,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588701588] [2022-11-23 13:53:07,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:53:07,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:07,214 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:07,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 13:53:07,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:53:07,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:53:07,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:53:07,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:07,348 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 [2022-11-23 13:53:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:07,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:10,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588701588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:10,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:53:10,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15, 13, 15, 13] total 34 [2022-11-23 13:53:10,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584360103] [2022-11-23 13:53:10,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:53:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 13:53:10,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:53:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 13:53:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 13:53:10,969 INFO L87 Difference]: Start difference. First operand 155 states and 218 transitions. Second operand has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:53:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:25,072 INFO L93 Difference]: Finished difference Result 191 states and 272 transitions. [2022-11-23 13:53:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 13:53:25,073 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-11-23 13:53:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:25,074 INFO L225 Difference]: With dead ends: 191 [2022-11-23 13:53:25,074 INFO L226 Difference]: Without dead ends: 191 [2022-11-23 13:53:25,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=900, Invalid=3132, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 13:53:25,076 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 453 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:25,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 809 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 13:53:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-23 13:53:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 173. [2022-11-23 13:53:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 147 states have (on average 1.510204081632653) internal successors, (222), 163 states have internal predecessors, (222), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:53:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2022-11-23 13:53:25,086 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 26 [2022-11-23 13:53:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:25,086 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2022-11-23 13:53:25,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:53:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2022-11-23 13:53:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 13:53:25,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:25,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:25,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:25,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:53:25,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:25,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:53:25,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:53:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:25,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1525074233, now seen corresponding path program 1 times [2022-11-23 13:53:25,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:53:25,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865709528] [2022-11-23 13:53:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:25,695 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 [2022-11-23 13:53:25,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:53:25,695 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:53:25,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:53:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:53:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:53:25,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:53:25,799 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:53:25,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865709528] [2022-11-23 13:53:25,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865709528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:25,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:25,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:53:25,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370882601] [2022-11-23 13:53:25,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:25,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:53:25,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:53:25,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:53:25,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:53:25,801 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 13:53:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:25,855 INFO L93 Difference]: Finished difference Result 241 states and 330 transitions. [2022-11-23 13:53:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:53:25,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-23 13:53:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:25,857 INFO L225 Difference]: With dead ends: 241 [2022-11-23 13:53:25,857 INFO L226 Difference]: Without dead ends: 241 [2022-11-23 13:53:25,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:53:25,858 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 29 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:25,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 266 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:53:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-23 13:53:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 179. [2022-11-23 13:53:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 153 states have (on average 1.4836601307189543) internal successors, (227), 166 states have internal predecessors, (227), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:53:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 247 transitions. [2022-11-23 13:53:25,866 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 247 transitions. Word has length 28 [2022-11-23 13:53:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:25,867 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 247 transitions. [2022-11-23 13:53:25,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 13:53:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 247 transitions. [2022-11-23 13:53:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 13:53:25,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:25,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:25,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:26,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:53:26,080 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:53:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082728, now seen corresponding path program 1 times [2022-11-23 13:53:26,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:53:26,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477093526] [2022-11-23 13:53:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:26,080 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 [2022-11-23 13:53:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:53:26,082 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:53:26,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (26)] Waiting until timeout for monitored process [2022-11-23 13:53:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:26,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:53:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:53:26,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:53:26,213 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:53:26,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477093526] [2022-11-23 13:53:26,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477093526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:26,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:26,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:53:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219828899] [2022-11-23 13:53:26,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:26,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:53:26,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:53:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:53:26,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:53:26,215 INFO L87 Difference]: Start difference. First operand 179 states and 247 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:53:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:26,296 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2022-11-23 13:53:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:53:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-23 13:53:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:26,298 INFO L225 Difference]: With dead ends: 201 [2022-11-23 13:53:26,298 INFO L226 Difference]: Without dead ends: 201 [2022-11-23 13:53:26,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:53:26,299 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 50 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:26,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 204 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:53:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-23 13:53:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 169. [2022-11-23 13:53:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 143 states have (on average 1.4545454545454546) internal successors, (208), 156 states have internal predecessors, (208), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:53:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 228 transitions. [2022-11-23 13:53:26,307 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 228 transitions. Word has length 28 [2022-11-23 13:53:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:26,308 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 228 transitions. [2022-11-23 13:53:26,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:53:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 228 transitions. [2022-11-23 13:53:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 13:53:26,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:26,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:26,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (26)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:26,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:53:26,520 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:53:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1822208300, now seen corresponding path program 2 times [2022-11-23 13:53:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:53:26,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292910958] [2022-11-23 13:53:26,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:53:26,521 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 [2022-11-23 13:53:26,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:53:26,523 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:53:26,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (27)] Waiting until timeout for monitored process [2022-11-23 13:53:26,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:53:26,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:53:26,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 13:53:26,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:26,659 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 [2022-11-23 13:53:26,666 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 [2022-11-23 13:53:27,419 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_297 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_297) |c_#length|)))) is different from true [2022-11-23 13:53:27,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:27,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:53:27,487 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:53:27,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:53:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 13:53:27,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:32,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:53:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292910958] [2022-11-23 13:53:32,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292910958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [311199065] [2022-11-23 13:53:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:53:32,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:53:32,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:53:32,314 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:53:32,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-23 13:53:32,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:53:32,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:53:32,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 13:53:32,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:32,521 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 [2022-11-23 13:53:32,528 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 [2022-11-23 13:53:32,913 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_319 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_319) |c_#length|)))) is different from true [2022-11-23 13:53:32,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:32,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:53:32,958 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:53:32,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:53:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 13:53:33,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:33,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [311199065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:33,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375520590] [2022-11-23 13:53:33,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:53:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:33,766 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:33,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 13:53:33,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:53:33,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:53:33,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 13:53:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:33,895 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 [2022-11-23 13:53:33,903 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 [2022-11-23 13:53:34,278 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_341 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_341) |c_#length|)))) is different from true [2022-11-23 13:53:34,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:34,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:53:34,343 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:53:34,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:53:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 13:53:34,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:36,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375520590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:36,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:53:36,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-11-23 13:53:36,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380593530] [2022-11-23 13:53:36,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:53:36,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 13:53:36,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:53:36,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 13:53:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=287, Unknown=4, NotChecked=108, Total=462 [2022-11-23 13:53:36,819 INFO L87 Difference]: Start difference. First operand 169 states and 228 transitions. Second operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 13:53:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:39,807 INFO L93 Difference]: Finished difference Result 325 states and 404 transitions. [2022-11-23 13:53:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 13:53:39,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-23 13:53:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:39,809 INFO L225 Difference]: With dead ends: 325 [2022-11-23 13:53:39,809 INFO L226 Difference]: Without dead ends: 325 [2022-11-23 13:53:39,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=191, Invalid=873, Unknown=4, NotChecked=192, Total=1260 [2022-11-23 13:53:39,811 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 442 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:39,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 871 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 971 Invalid, 0 Unknown, 619 Unchecked, 2.1s Time] [2022-11-23 13:53:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-23 13:53:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 178. [2022-11-23 13:53:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 151 states have (on average 1.4370860927152318) internal successors, (217), 163 states have internal predecessors, (217), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-23 13:53:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 240 transitions. [2022-11-23 13:53:39,819 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 240 transitions. Word has length 29 [2022-11-23 13:53:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:39,819 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 240 transitions. [2022-11-23 13:53:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 13:53:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 240 transitions. [2022-11-23 13:53:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 13:53:39,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:39,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:39,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (27)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:40,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-23 13:53:40,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:40,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:53:40,432 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:53:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -475836742, now seen corresponding path program 1 times [2022-11-23 13:53:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:53:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031186465] [2022-11-23 13:53:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:40,433 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 [2022-11-23 13:53:40,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:53:40,434 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:53:40,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (30)] Waiting until timeout for monitored process [2022-11-23 13:53:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:53:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:40,520 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 [2022-11-23 13:53:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:53:40,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:53:40,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:53:40,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031186465] [2022-11-23 13:53:40,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031186465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:40,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648649870] [2022-11-23 13:53:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:40,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:53:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:53:40,725 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:53:40,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-23 13:53:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:40,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 13:53:40,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:40,876 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 [2022-11-23 13:53:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:53:40,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:53:41,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648649870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:41,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164523834] [2022-11-23 13:53:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:41,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:41,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:41,046 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:41,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 13:53:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:41,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:53:41,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:41,154 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 [2022-11-23 13:53:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:53:41,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:53:41,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164523834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:41,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:53:41,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 7 [2022-11-23 13:53:41,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173666739] [2022-11-23 13:53:41,321 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:53:41,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:53:41,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:53:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:53:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:53:41,322 INFO L87 Difference]: Start difference. First operand 178 states and 240 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:53:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:41,658 INFO L93 Difference]: Finished difference Result 204 states and 271 transitions. [2022-11-23 13:53:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:53:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-11-23 13:53:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:41,660 INFO L225 Difference]: With dead ends: 204 [2022-11-23 13:53:41,660 INFO L226 Difference]: Without dead ends: 204 [2022-11-23 13:53:41,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:53:41,661 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:41,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 279 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:53:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-23 13:53:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 180. [2022-11-23 13:53:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 165 states have internal predecessors, (220), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-23 13:53:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 243 transitions. [2022-11-23 13:53:41,668 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 243 transitions. Word has length 31 [2022-11-23 13:53:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:41,668 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 243 transitions. [2022-11-23 13:53:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:53:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 243 transitions. [2022-11-23 13:53:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 13:53:41,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:41,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:41,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (30)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:41,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-23 13:53:42,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-23 13:53:42,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:42,281 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:53:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash -475836741, now seen corresponding path program 1 times [2022-11-23 13:53:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:53:42,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887531228] [2022-11-23 13:53:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:42,282 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 [2022-11-23 13:53:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:53:42,283 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:53:42,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Waiting until timeout for monitored process [2022-11-23 13:53:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 13:53:42,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:42,412 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 [2022-11-23 13:53:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:42,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:44,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:53:44,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887531228] [2022-11-23 13:53:44,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887531228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:44,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1887016983] [2022-11-23 13:53:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:44,181 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:53:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:53:44,182 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:53:44,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-23 13:53:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:44,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 13:53:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:44,353 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 [2022-11-23 13:53:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:45,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:47,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1887016983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:47,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971797531] [2022-11-23 13:53:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:47,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:47,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:47,552 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:47,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-23 13:53:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 13:53:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:47,673 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 [2022-11-23 13:53:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:47,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:53:49,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971797531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:49,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:53:49,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 13, 11, 13, 11] total 31 [2022-11-23 13:53:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735370375] [2022-11-23 13:53:49,122 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:53:49,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 13:53:49,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:53:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 13:53:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-11-23 13:53:49,123 INFO L87 Difference]: Start difference. First operand 180 states and 243 transitions. Second operand has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 13:53:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:58,837 INFO L93 Difference]: Finished difference Result 419 states and 506 transitions. [2022-11-23 13:53:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 13:53:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 31 [2022-11-23 13:53:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:58,839 INFO L225 Difference]: With dead ends: 419 [2022-11-23 13:53:58,840 INFO L226 Difference]: Without dead ends: 419 [2022-11-23 13:53:58,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=467, Invalid=2289, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 13:53:58,841 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 888 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:58,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1776 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-23 13:53:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-23 13:53:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 205. [2022-11-23 13:53:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 177 states have (on average 1.4519774011299436) internal successors, (257), 189 states have internal predecessors, (257), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (17), 14 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-23 13:53:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 283 transitions. [2022-11-23 13:53:58,854 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 283 transitions. Word has length 31 [2022-11-23 13:53:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:58,854 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 283 transitions. [2022-11-23 13:53:58,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 13:53:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 283 transitions. [2022-11-23 13:53:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 13:53:58,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:58,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:58,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:59,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-23 13:53:59,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:59,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:53:59,458 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:53:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:59,459 INFO L85 PathProgramCache]: Analyzing trace with hash 818465469, now seen corresponding path program 1 times [2022-11-23 13:53:59,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:53:59,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835493437] [2022-11-23 13:53:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:59,459 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 [2022-11-23 13:53:59,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:53:59,460 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:53:59,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (36)] Waiting until timeout for monitored process [2022-11-23 13:53:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 13:53:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:53:59,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:59,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:53:59,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-23 13:54:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:00,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:00,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835493437] [2022-11-23 13:54:00,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835493437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:00,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [573164890] [2022-11-23 13:54:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:00,411 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:00,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:00,412 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:00,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-23 13:54:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:54:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:00,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:00,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:54:00,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-23 13:54:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:01,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [573164890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:01,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985072480] [2022-11-23 13:54:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:01,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:01,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:01,040 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:01,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-23 13:54:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 13:54:01,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:01,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:01,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:54:01,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-23 13:54:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:01,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985072480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:01,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:01,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2022-11-23 13:54:01,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722322522] [2022-11-23 13:54:01,645 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:01,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 13:54:01,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 13:54:01,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-23 13:54:01,647 INFO L87 Difference]: Start difference. First operand 205 states and 283 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:54:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:03,854 INFO L93 Difference]: Finished difference Result 457 states and 602 transitions. [2022-11-23 13:54:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 13:54:03,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-11-23 13:54:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:03,857 INFO L225 Difference]: With dead ends: 457 [2022-11-23 13:54:03,857 INFO L226 Difference]: Without dead ends: 457 [2022-11-23 13:54:03,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-11-23 13:54:03,858 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 458 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:03,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 534 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 13:54:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-23 13:54:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 166. [2022-11-23 13:54:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 141 states have (on average 1.425531914893617) internal successors, (201), 154 states have internal predecessors, (201), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:54:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 221 transitions. [2022-11-23 13:54:03,867 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 221 transitions. Word has length 32 [2022-11-23 13:54:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:03,867 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 221 transitions. [2022-11-23 13:54:03,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:54:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 221 transitions. [2022-11-23 13:54:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 13:54:03,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:03,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:03,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (36)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:04,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-23 13:54:04,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:04,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:04,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:04,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1191141044, now seen corresponding path program 3 times [2022-11-23 13:54:04,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:04,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515244734] [2022-11-23 13:54:04,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:54:04,481 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 [2022-11-23 13:54:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:04,482 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:04,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Waiting until timeout for monitored process [2022-11-23 13:54:04,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:54:04,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:54:04,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 13:54:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:04,610 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 [2022-11-23 13:54:04,615 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 [2022-11-23 13:54:05,085 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_477 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_477) |c_#length|)))) is different from true [2022-11-23 13:54:05,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:05,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:54:05,132 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:54:05,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:54:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-11-23 13:54:05,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:05,723 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515244734] [2022-11-23 13:54:05,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515244734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1141769614] [2022-11-23 13:54:05,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:54:05,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:05,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:05,725 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:05,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-23 13:54:05,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:54:05,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:54:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 13:54:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:05,934 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 [2022-11-23 13:54:05,943 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 [2022-11-23 13:54:06,257 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_505 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_505) |c_#length|)))) is different from true [2022-11-23 13:54:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:06,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:54:06,293 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:54:06,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:54:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-11-23 13:54:06,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:06,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1141769614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345025378] [2022-11-23 13:54:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:54:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:06,694 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:06,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-23 13:54:06,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:54:06,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:54:06,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 13:54:06,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:06,823 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 [2022-11-23 13:54:06,830 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 [2022-11-23 13:54:07,161 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_533 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_533) |c_#length|)))) is different from true [2022-11-23 13:54:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:07,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:54:07,196 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:54:07,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:54:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-11-23 13:54:07,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:07,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345025378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:07,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:54:07,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-11-23 13:54:07,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644416098] [2022-11-23 13:54:07,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:07,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 13:54:07,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 13:54:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=155, Unknown=3, NotChecked=78, Total=272 [2022-11-23 13:54:07,567 INFO L87 Difference]: Start difference. First operand 166 states and 221 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 13:54:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:09,050 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2022-11-23 13:54:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:54:09,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-23 13:54:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:09,053 INFO L225 Difference]: With dead ends: 219 [2022-11-23 13:54:09,053 INFO L226 Difference]: Without dead ends: 219 [2022-11-23 13:54:09,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=409, Unknown=3, NotChecked=132, Total=650 [2022-11-23 13:54:09,054 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 334 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:09,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 410 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 404 Invalid, 0 Unknown, 375 Unchecked, 1.0s Time] [2022-11-23 13:54:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-23 13:54:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2022-11-23 13:54:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 133 states have (on average 1.4285714285714286) internal successors, (190), 147 states have internal predecessors, (190), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 13:54:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2022-11-23 13:54:09,065 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 32 [2022-11-23 13:54:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:09,065 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2022-11-23 13:54:09,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 13:54:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2022-11-23 13:54:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 13:54:09,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:09,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:09,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:09,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-23 13:54:09,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Ended with exit code 0 [2022-11-23 13:54:09,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:54:09,674 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:09,674 INFO L85 PathProgramCache]: Analyzing trace with hash -397374190, now seen corresponding path program 1 times [2022-11-23 13:54:09,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:09,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480741066] [2022-11-23 13:54:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:09,675 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 [2022-11-23 13:54:09,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:09,676 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:09,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Waiting until timeout for monitored process [2022-11-23 13:54:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:09,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 13:54:09,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:09,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:09,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:09,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:10,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 13:54:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:10,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:10,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480741066] [2022-11-23 13:54:10,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480741066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:10,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1620112401] [2022-11-23 13:54:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:10,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:10,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:10,232 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:10,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-23 13:54:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 13:54:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:10,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:10,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:54:10,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:10,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 13:54:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:10,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1620112401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407830477] [2022-11-23 13:54:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:10,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:10,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:10,928 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:10,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-23 13:54:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 13:54:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:11,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:11,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:54:11,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:11,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 13:54:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:11,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407830477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:11,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:11,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 8, 10, 8] total 19 [2022-11-23 13:54:11,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080777576] [2022-11-23 13:54:11,314 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:11,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 13:54:11,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 13:54:11,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:54:11,315 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 13:54:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:12,274 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2022-11-23 13:54:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 13:54:12,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2022-11-23 13:54:12,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:12,277 INFO L225 Difference]: With dead ends: 254 [2022-11-23 13:54:12,277 INFO L226 Difference]: Without dead ends: 254 [2022-11-23 13:54:12,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-11-23 13:54:12,278 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 208 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:12,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 545 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:54:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-23 13:54:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 177. [2022-11-23 13:54:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 153 states have (on average 1.457516339869281) internal successors, (223), 166 states have internal predecessors, (223), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 13:54:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 240 transitions. [2022-11-23 13:54:12,285 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 240 transitions. Word has length 33 [2022-11-23 13:54:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:12,286 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 240 transitions. [2022-11-23 13:54:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 13:54:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 240 transitions. [2022-11-23 13:54:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 13:54:12,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:12,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:12,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:12,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-23 13:54:12,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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)] Ended with exit code 0 [2022-11-23 13:54:12,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:54:12,893 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2012618870, now seen corresponding path program 1 times [2022-11-23 13:54:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:12,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693214904] [2022-11-23 13:54:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:12,894 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 [2022-11-23 13:54:12,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:12,894 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:12,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (45)] Waiting until timeout for monitored process [2022-11-23 13:54:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:12,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:54:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:54:13,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:13,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:13,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693214904] [2022-11-23 13:54:13,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693214904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:13,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [946683908] [2022-11-23 13:54:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:13,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:13,379 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:13,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-23 13:54:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:13,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:54:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:54:13,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:13,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [946683908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:13,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813049560] [2022-11-23 13:54:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:13,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:13,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:13,672 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:13,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-23 13:54:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:13,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:54:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:13,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:14,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813049560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:14,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:14,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 9, 7] total 21 [2022-11-23 13:54:14,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715568942] [2022-11-23 13:54:14,210 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:14,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:54:14,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:54:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-23 13:54:14,212 INFO L87 Difference]: Start difference. First operand 177 states and 240 transitions. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 13:54:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:15,450 INFO L93 Difference]: Finished difference Result 313 states and 414 transitions. [2022-11-23 13:54:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 13:54:15,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 33 [2022-11-23 13:54:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:15,455 INFO L225 Difference]: With dead ends: 313 [2022-11-23 13:54:15,456 INFO L226 Difference]: Without dead ends: 311 [2022-11-23 13:54:15,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 13:54:15,457 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 769 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:15,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 421 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:54:15,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-23 13:54:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 175. [2022-11-23 13:54:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 152 states have (on average 1.4078947368421053) internal successors, (214), 163 states have internal predecessors, (214), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 13:54:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2022-11-23 13:54:15,464 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 33 [2022-11-23 13:54:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:15,464 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2022-11-23 13:54:15,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 13:54:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2022-11-23 13:54:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 13:54:15,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:15,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:15,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:15,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (45)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:15,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:16,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:16,080 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:16,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2012573126, now seen corresponding path program 1 times [2022-11-23 13:54:16,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:16,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201431914] [2022-11-23 13:54:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:16,082 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 [2022-11-23 13:54:16,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:16,083 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:16,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (48)] Waiting until timeout for monitored process [2022-11-23 13:54:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:54:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:16,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:16,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:16,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:16,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 13:54:16,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-23 13:54:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:16,646 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:16,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201431914] [2022-11-23 13:54:16,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201431914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:16,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [188919407] [2022-11-23 13:54:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:16,646 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:16,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:16,650 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:16,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-23 13:54:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:16,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 13:54:16,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:17,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:17,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:17,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:17,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 13:54:17,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-23 13:54:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:54:17,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [188919407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:17,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625416449] [2022-11-23 13:54:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:17,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:17,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:17,704 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:17,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-23 13:54:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 13:54:17,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:18,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:18,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:18,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:18,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 13:54:18,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-23 13:54:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:18,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625416449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:18,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:18,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 6, 9, 6] total 26 [2022-11-23 13:54:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043419365] [2022-11-23 13:54:18,546 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:18,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 13:54:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 13:54:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-23 13:54:18,547 INFO L87 Difference]: Start difference. First operand 175 states and 231 transitions. Second operand has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 13:54:20,589 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 [0] [2022-11-23 13:54:22,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:54:25,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:54:28,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:54:30,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:54:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:30,208 INFO L93 Difference]: Finished difference Result 249 states and 316 transitions. [2022-11-23 13:54:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 13:54:30,209 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2022-11-23 13:54:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:30,211 INFO L225 Difference]: With dead ends: 249 [2022-11-23 13:54:30,211 INFO L226 Difference]: Without dead ends: 249 [2022-11-23 13:54:30,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 13:54:30,212 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 342 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 23 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:30,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 562 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 449 Invalid, 5 Unknown, 0 Unchecked, 11.1s Time] [2022-11-23 13:54:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-23 13:54:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 188. [2022-11-23 13:54:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 163 states have (on average 1.3865030674846626) internal successors, (226), 175 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 13:54:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2022-11-23 13:54:30,219 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 33 [2022-11-23 13:54:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:30,220 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2022-11-23 13:54:30,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 13:54:30,220 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2022-11-23 13:54:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 13:54:30,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:30,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:30,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (48)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:30,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:30,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:30,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:30,833 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash 566302140, now seen corresponding path program 1 times [2022-11-23 13:54:30,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:30,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907329997] [2022-11-23 13:54:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:30,834 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 [2022-11-23 13:54:30,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:30,835 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:30,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (51)] Waiting until timeout for monitored process [2022-11-23 13:54:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:54:30,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:31,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:31,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:54:31,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:31,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 13:54:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:32,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:32,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907329997] [2022-11-23 13:54:32,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907329997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:32,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385586091] [2022-11-23 13:54:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:32,063 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:32,064 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:32,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-23 13:54:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 13:54:32,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:32,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:32,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:32,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:32,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 13:54:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:33,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1385586091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:33,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386004271] [2022-11-23 13:54:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:33,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:33,084 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:33,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-23 13:54:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:33,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 13:54:33,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:33,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:33,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:33,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:33,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 13:54:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:33,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386004271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:33,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:33,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11, 8, 11, 8] total 26 [2022-11-23 13:54:33,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518650301] [2022-11-23 13:54:33,559 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:33,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 13:54:33,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 13:54:33,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-11-23 13:54:33,560 INFO L87 Difference]: Start difference. First operand 188 states and 243 transitions. Second operand has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-23 13:54:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:36,070 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2022-11-23 13:54:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 13:54:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2022-11-23 13:54:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:36,072 INFO L225 Difference]: With dead ends: 240 [2022-11-23 13:54:36,072 INFO L226 Difference]: Without dead ends: 240 [2022-11-23 13:54:36,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 13:54:36,073 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 460 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:36,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 618 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 13:54:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-23 13:54:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 189. [2022-11-23 13:54:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 164 states have (on average 1.3841463414634145) internal successors, (227), 176 states have internal predecessors, (227), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 13:54:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 244 transitions. [2022-11-23 13:54:36,080 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 244 transitions. Word has length 34 [2022-11-23 13:54:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:36,080 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 244 transitions. [2022-11-23 13:54:36,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-23 13:54:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 244 transitions. [2022-11-23 13:54:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 13:54:36,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:36,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:36,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-23 13:54:36,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (51)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:36,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-23 13:54:36,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:36,688 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 375497300, now seen corresponding path program 1 times [2022-11-23 13:54:36,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:36,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939709044] [2022-11-23 13:54:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:36,688 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 [2022-11-23 13:54:36,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:36,689 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:36,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (54)] Waiting until timeout for monitored process [2022-11-23 13:54:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:36,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 13:54:36,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:36,853 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 [2022-11-23 13:54:36,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:37,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 13:54:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:37,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:37,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-11-23 13:54:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:37,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939709044] [2022-11-23 13:54:37,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939709044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:37,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505784703] [2022-11-23 13:54:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:37,479 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:37,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-23 13:54:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 13:54:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:37,866 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 [2022-11-23 13:54:38,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:38,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 13:54:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:38,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:38,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-11-23 13:54:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:38,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1505784703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218319956] [2022-11-23 13:54:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:38,423 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:38,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-23 13:54:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:54:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:38,590 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 [2022-11-23 13:54:38,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:38,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 13:54:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:38,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:38,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-11-23 13:54:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:38,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218319956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:38,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:38,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 8, 11, 8] total 20 [2022-11-23 13:54:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828427333] [2022-11-23 13:54:38,930 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:38,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:54:38,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:54:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-23 13:54:38,931 INFO L87 Difference]: Start difference. First operand 189 states and 244 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 13:54:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:39,979 INFO L93 Difference]: Finished difference Result 215 states and 270 transitions. [2022-11-23 13:54:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:54:39,980 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2022-11-23 13:54:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:39,981 INFO L225 Difference]: With dead ends: 215 [2022-11-23 13:54:39,981 INFO L226 Difference]: Without dead ends: 215 [2022-11-23 13:54:39,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 180 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-11-23 13:54:39,982 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 194 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:39,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 497 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:54:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-23 13:54:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 190. [2022-11-23 13:54:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.3818181818181818) internal successors, (228), 177 states have internal predecessors, (228), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 13:54:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2022-11-23 13:54:39,987 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 35 [2022-11-23 13:54:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:39,989 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2022-11-23 13:54:39,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 13:54:39,997 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2022-11-23 13:54:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 13:54:39,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:39,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:40,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (54)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:40,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:40,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-23 13:54:40,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:40,599 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:40,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2027972411, now seen corresponding path program 1 times [2022-11-23 13:54:40,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:40,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644714295] [2022-11-23 13:54:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:40,600 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 [2022-11-23 13:54:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:40,601 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:40,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (57)] Waiting until timeout for monitored process [2022-11-23 13:54:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:54:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:40,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:54:41,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:41,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644714295] [2022-11-23 13:54:41,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644714295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:41,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830329582] [2022-11-23 13:54:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:41,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:41,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:41,206 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:41,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-23 13:54:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:41,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:54:41,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:41,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:54:41,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830329582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:41,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155593524] [2022-11-23 13:54:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:41,580 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:41,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-23 13:54:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:54:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:41,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:54:41,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155593524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:41,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:41,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10, 7, 10, 7] total 16 [2022-11-23 13:54:41,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352291675] [2022-11-23 13:54:41,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:41,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 13:54:41,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 13:54:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-23 13:54:41,874 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 13:54:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:42,637 INFO L93 Difference]: Finished difference Result 299 states and 358 transitions. [2022-11-23 13:54:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:54:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2022-11-23 13:54:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:42,641 INFO L225 Difference]: With dead ends: 299 [2022-11-23 13:54:42,641 INFO L226 Difference]: Without dead ends: 299 [2022-11-23 13:54:42,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-11-23 13:54:42,642 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 590 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:42,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 484 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:54:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-23 13:54:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 203. [2022-11-23 13:54:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 177 states have (on average 1.3615819209039548) internal successors, (241), 188 states have internal predecessors, (241), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:54:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 261 transitions. [2022-11-23 13:54:42,653 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 261 transitions. Word has length 36 [2022-11-23 13:54:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:42,653 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 261 transitions. [2022-11-23 13:54:42,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 13:54:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 261 transitions. [2022-11-23 13:54:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 13:54:42,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:42,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:42,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:42,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:43,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (57)] Ended with exit code 0 [2022-11-23 13:54:43,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:54:43,264 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1883049109, now seen corresponding path program 1 times [2022-11-23 13:54:43,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:43,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070933162] [2022-11-23 13:54:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:43,265 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 [2022-11-23 13:54:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:43,265 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:43,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (60)] Waiting until timeout for monitored process [2022-11-23 13:54:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:43,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:54:43,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:54:43,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:43,420 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:43,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070933162] [2022-11-23 13:54:43,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070933162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:43,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:54:43,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:54:43,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656673280] [2022-11-23 13:54:43,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:43,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:54:43,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:43,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:54:43,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:54:43,423 INFO L87 Difference]: Start difference. First operand 203 states and 261 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 13:54:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:43,447 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2022-11-23 13:54:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:54:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-23 13:54:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:43,450 INFO L225 Difference]: With dead ends: 195 [2022-11-23 13:54:43,450 INFO L226 Difference]: Without dead ends: 195 [2022-11-23 13:54:43,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:54:43,451 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 37 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:43,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 245 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:54:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-23 13:54:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 165. [2022-11-23 13:54:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 141 states have (on average 1.3191489361702127) internal successors, (186), 153 states have internal predecessors, (186), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 13:54:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 200 transitions. [2022-11-23 13:54:43,456 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 200 transitions. Word has length 35 [2022-11-23 13:54:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:43,456 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 200 transitions. [2022-11-23 13:54:43,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 13:54:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 200 transitions. [2022-11-23 13:54:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 13:54:43,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:43,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:43,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (60)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:43,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:54:43,669 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2145816479, now seen corresponding path program 1 times [2022-11-23 13:54:43,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:43,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444201921] [2022-11-23 13:54:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:43,670 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 [2022-11-23 13:54:43,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:43,674 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:43,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (61)] Waiting until timeout for monitored process [2022-11-23 13:54:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:54:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:44,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:44,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:44,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444201921] [2022-11-23 13:54:44,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444201921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:44,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [119588981] [2022-11-23 13:54:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:44,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:44,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:44,350 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:44,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-23 13:54:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:54:44,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:44,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:54:44,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [119588981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506082704] [2022-11-23 13:54:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:44,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:44,766 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:44,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-23 13:54:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 13:54:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:45,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:54:45,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:54:45,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:54:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:45,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:47,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-23 13:54:47,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-23 13:54:47,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-23 13:54:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:54:48,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506082704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:48,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:48,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10, 7, 10, 9] total 33 [2022-11-23 13:54:48,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560826498] [2022-11-23 13:54:48,077 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:48,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 13:54:48,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 13:54:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=949, Unknown=1, NotChecked=0, Total=1056 [2022-11-23 13:54:48,085 INFO L87 Difference]: Start difference. First operand 165 states and 200 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 31 states have internal predecessors, (108), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 13:54:51,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:54:54,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:54:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:57,019 INFO L93 Difference]: Finished difference Result 243 states and 277 transitions. [2022-11-23 13:54:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 13:54:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 31 states have internal predecessors, (108), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 37 [2022-11-23 13:54:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:57,021 INFO L225 Difference]: With dead ends: 243 [2022-11-23 13:54:57,021 INFO L226 Difference]: Without dead ends: 243 [2022-11-23 13:54:57,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=796, Invalid=3625, Unknown=1, NotChecked=0, Total=4422 [2022-11-23 13:54:57,023 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 813 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:57,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 699 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 509 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 13:54:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-23 13:54:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 187. [2022-11-23 13:54:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.2822085889570551) internal successors, (209), 174 states have internal predecessors, (209), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 13:54:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 223 transitions. [2022-11-23 13:54:57,029 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 223 transitions. Word has length 37 [2022-11-23 13:54:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:57,029 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 223 transitions. [2022-11-23 13:54:57,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 31 states have internal predecessors, (108), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 13:54:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 223 transitions. [2022-11-23 13:54:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 13:54:57,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:57,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:57,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (61)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:57,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:57,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-23 13:54:57,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:57,642 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:54:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash 731071653, now seen corresponding path program 2 times [2022-11-23 13:54:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:57,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539007074] [2022-11-23 13:54:57,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:54:57,643 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 [2022-11-23 13:54:57,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:57,645 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:54:57,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (64)] Waiting until timeout for monitored process [2022-11-23 13:54:57,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:54:57,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:54:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 13:54:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:57,904 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 [2022-11-23 13:54:57,913 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 [2022-11-23 13:54:58,716 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_883 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_883) |c_#length|)))) is different from true [2022-11-23 13:54:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:58,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:54:58,754 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:54:58,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:54:59,100 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_884 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_884) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 13:54:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:59,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:54:59,132 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:54:59,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:54:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-11-23 13:54:59,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:05,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:55:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539007074] [2022-11-23 13:55:05,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539007074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:05,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1572818859] [2022-11-23 13:55:05,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:55:05,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:55:05,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:55:05,181 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:55:05,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-23 13:55:05,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:55:05,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:55:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 13:55:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:05,458 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 [2022-11-23 13:55:05,464 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 [2022-11-23 13:55:05,807 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_914 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_914) |c_#length|)))) is different from true [2022-11-23 13:55:05,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:05,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:55:05,838 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:55:05,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:55:06,054 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_915 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_915) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 13:55:06,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:06,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:55:06,096 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:55:06,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:55:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-11-23 13:55:06,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:07,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1572818859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:07,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037856828] [2022-11-23 13:55:07,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:55:07,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:07,008 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:55:07,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-23 13:55:07,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:55:07,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:55:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 13:55:07,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:07,174 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 [2022-11-23 13:55:07,180 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 [2022-11-23 13:55:07,581 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_945 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_945) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 13:55:07,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:07,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:55:07,612 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:55:07,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:55:07,842 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_946 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_946) |c_#length|)))) is different from true [2022-11-23 13:55:07,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:07,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-23 13:55:07,881 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:55:07,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:55:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-11-23 13:55:07,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:08,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037856828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:08,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:55:08,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 24 [2022-11-23 13:55:08,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765974265] [2022-11-23 13:55:08,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:55:08,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 13:55:08,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:55:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 13:55:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=360, Unknown=7, NotChecked=258, Total=702 [2022-11-23 13:55:08,753 INFO L87 Difference]: Start difference. First operand 187 states and 223 transitions. Second operand has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 13:55:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:12,234 INFO L93 Difference]: Finished difference Result 296 states and 341 transitions. [2022-11-23 13:55:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 13:55:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 39 [2022-11-23 13:55:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:12,237 INFO L225 Difference]: With dead ends: 296 [2022-11-23 13:55:12,237 INFO L226 Difference]: Without dead ends: 296 [2022-11-23 13:55:12,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=226, Invalid=1123, Unknown=7, NotChecked=450, Total=1806 [2022-11-23 13:55:12,238 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 475 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:12,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 877 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1027 Invalid, 0 Unknown, 931 Unchecked, 2.3s Time] [2022-11-23 13:55:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-23 13:55:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 199. [2022-11-23 13:55:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.2716763005780347) internal successors, (220), 184 states have internal predecessors, (220), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:55:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 240 transitions. [2022-11-23 13:55:12,245 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 240 transitions. Word has length 39 [2022-11-23 13:55:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:12,245 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 240 transitions. [2022-11-23 13:55:12,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 13:55:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 240 transitions. [2022-11-23 13:55:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 13:55:12,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:12,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:12,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-23 13:55:12,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (64)] Ended with exit code 0 [2022-11-23 13:55:12,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-23 13:55:12,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:12,851 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:55:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash -275846323, now seen corresponding path program 1 times [2022-11-23 13:55:12,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:55:12,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595938269] [2022-11-23 13:55:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:12,852 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 [2022-11-23 13:55:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:55:12,852 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:55:12,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (67)] Waiting until timeout for monitored process [2022-11-23 13:55:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 13:55:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:13,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:55:13,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:55:13,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 13:55:13,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:55:13,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:55:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:13,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:13,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:55:13,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595938269] [2022-11-23 13:55:13,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595938269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:13,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [565804635] [2022-11-23 13:55:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:13,711 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:55:13,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:55:13,716 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:55:13,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-23 13:55:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:13,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 13:55:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:13,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:55:14,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:55:14,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 13:55:14,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:55:14,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:55:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:14,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:14,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [565804635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492262867] [2022-11-23 13:55:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:14,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:14,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:14,711 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:55:14,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-23 13:55:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:14,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:55:14,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:14,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:55:14,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:55:14,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 13:55:15,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:55:15,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:55:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:15,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:15,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492262867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:15,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:55:15,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 16 [2022-11-23 13:55:15,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703018070] [2022-11-23 13:55:15,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:55:15,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 13:55:15,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:55:15,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 13:55:15,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-23 13:55:15,331 INFO L87 Difference]: Start difference. First operand 199 states and 240 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:55:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:16,147 INFO L93 Difference]: Finished difference Result 219 states and 260 transitions. [2022-11-23 13:55:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 13:55:16,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-11-23 13:55:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:16,149 INFO L225 Difference]: With dead ends: 219 [2022-11-23 13:55:16,149 INFO L226 Difference]: Without dead ends: 219 [2022-11-23 13:55:16,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-23 13:55:16,150 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:16,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 555 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:55:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-23 13:55:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 211. [2022-11-23 13:55:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 185 states have (on average 1.2540540540540541) internal successors, (232), 196 states have internal predecessors, (232), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:55:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 252 transitions. [2022-11-23 13:55:16,157 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 252 transitions. Word has length 40 [2022-11-23 13:55:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:16,157 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 252 transitions. [2022-11-23 13:55:16,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:55:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 252 transitions. [2022-11-23 13:55:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 13:55:16,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:16,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:16,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-23 13:55:16,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (67)] Ended with exit code 0 [2022-11-23 13:55:16,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-23 13:55:16,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:55:16,765 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:55:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:16,765 INFO L85 PathProgramCache]: Analyzing trace with hash -72017103, now seen corresponding path program 1 times [2022-11-23 13:55:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:55:16,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99440029] [2022-11-23 13:55:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:16,765 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 [2022-11-23 13:55:16,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:55:16,766 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:55:16,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (70)] Waiting until timeout for monitored process [2022-11-23 13:55:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:55:16,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:55:17,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:17,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-23 13:55:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:55:18,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:55:18,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99440029] [2022-11-23 13:55:18,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99440029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:18,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71815946] [2022-11-23 13:55:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:18,081 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:55:18,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:55:18,082 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:55:18,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-23 13:55:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:55:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:55:18,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:22,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-23 13:55:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:55:22,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71815946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654791296] [2022-11-23 13:55:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:22,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:22,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:22,940 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:55:22,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-23 13:55:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:23,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:55:23,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:55:23,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:31,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-23 13:55:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:55:31,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654791296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:31,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:55:31,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 19 [2022-11-23 13:55:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886349089] [2022-11-23 13:55:31,658 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:55:31,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 13:55:31,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:55:31,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 13:55:31,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=323, Unknown=6, NotChecked=0, Total=380 [2022-11-23 13:55:31,659 INFO L87 Difference]: Start difference. First operand 211 states and 252 transitions. Second operand has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 13:55:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:34,257 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2022-11-23 13:55:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 13:55:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2022-11-23 13:55:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:34,259 INFO L225 Difference]: With dead ends: 284 [2022-11-23 13:55:34,260 INFO L226 Difference]: Without dead ends: 284 [2022-11-23 13:55:34,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=136, Invalid=728, Unknown=6, NotChecked=0, Total=870 [2022-11-23 13:55:34,261 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 481 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:34,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 910 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 13:55:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-23 13:55:34,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 208. [2022-11-23 13:55:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.2349726775956285) internal successors, (226), 193 states have internal predecessors, (226), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:55:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 246 transitions. [2022-11-23 13:55:34,267 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 246 transitions. Word has length 41 [2022-11-23 13:55:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:34,268 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 246 transitions. [2022-11-23 13:55:34,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 13:55:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 246 transitions. [2022-11-23 13:55:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 13:55:34,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:34,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:34,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-23 13:55:34,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-23 13:55:34,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (70)] Forceful destruction successful, exit code 0 [2022-11-23 13:55:34,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:55:34,872 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:55:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:34,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836544, now seen corresponding path program 1 times [2022-11-23 13:55:34,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:55:34,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469065444] [2022-11-23 13:55:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:34,873 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 [2022-11-23 13:55:34,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:55:34,874 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:55:34,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (73)] Waiting until timeout for monitored process [2022-11-23 13:55:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:35,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 13:55:35,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:35,066 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 [2022-11-23 13:55:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:35,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:37,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:55:37,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469065444] [2022-11-23 13:55:37,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469065444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:37,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412521261] [2022-11-23 13:55:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:37,788 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:55:37,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:55:37,792 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:55:37,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-23 13:55:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 13:55:38,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:38,092 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 [2022-11-23 13:55:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:39,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:42,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412521261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:42,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097519240] [2022-11-23 13:55:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:42,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:42,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:42,370 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:55:42,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-23 13:55:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:42,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 13:55:42,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:42,539 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 [2022-11-23 13:55:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:43,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:45,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097519240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:45,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:55:45,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 16, 13, 14, 12] total 47 [2022-11-23 13:55:45,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267830222] [2022-11-23 13:55:45,940 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:55:45,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-23 13:55:45,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:55:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-23 13:55:45,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 13:55:45,942 INFO L87 Difference]: Start difference. First operand 208 states and 246 transitions. Second operand has 48 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 43 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 13:56:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:01,105 INFO L93 Difference]: Finished difference Result 367 states and 400 transitions. [2022-11-23 13:56:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 13:56:01,107 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 43 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 40 [2022-11-23 13:56:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:01,108 INFO L225 Difference]: With dead ends: 367 [2022-11-23 13:56:01,108 INFO L226 Difference]: Without dead ends: 367 [2022-11-23 13:56:01,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=900, Invalid=5262, Unknown=0, NotChecked=0, Total=6162 [2022-11-23 13:56:01,110 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1236 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:01,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 2237 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-23 13:56:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-23 13:56:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 208. [2022-11-23 13:56:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.2349726775956285) internal successors, (226), 193 states have internal predecessors, (226), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:56:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 246 transitions. [2022-11-23 13:56:01,117 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 246 transitions. Word has length 40 [2022-11-23 13:56:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:01,117 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 246 transitions. [2022-11-23 13:56:01,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 43 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 13:56:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 246 transitions. [2022-11-23 13:56:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 13:56:01,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:01,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:01,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:01,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (73)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:01,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-11-23 13:56:01,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:01,726 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:56:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 392679819, now seen corresponding path program 1 times [2022-11-23 13:56:01,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:01,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639919651] [2022-11-23 13:56:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:01,727 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 [2022-11-23 13:56:01,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:01,728 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:56:01,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (76)] Waiting until timeout for monitored process [2022-11-23 13:56:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:01,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 13:56:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:01,893 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 [2022-11-23 13:56:02,019 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:02,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:02,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:56:02,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-23 13:56:02,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:56:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:02,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:02,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-11-23 13:56:02,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:56:02,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-11-23 13:56:04,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:56:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639919651] [2022-11-23 13:56:04,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639919651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305379614] [2022-11-23 13:56:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:04,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:04,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:56:04,847 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:56:04,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-23 13:56:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:05,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 13:56:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:05,140 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 [2022-11-23 13:56:05,397 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:05,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:05,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:56:05,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-23 13:56:05,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:56:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:05,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:05,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-11-23 13:56:05,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:56:05,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-11-23 13:56:06,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [305379614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:06,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743722940] [2022-11-23 13:56:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:06,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:06,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:06,111 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:06,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-23 13:56:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:06,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 13:56:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:06,268 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 [2022-11-23 13:56:06,364 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:06,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:06,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:56:06,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-23 13:56:06,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:56:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:06,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:06,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-11-23 13:56:06,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:56:06,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-11-23 13:56:08,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743722940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:08,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:56:08,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 20 [2022-11-23 13:56:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643666142] [2022-11-23 13:56:08,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:56:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:56:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:56:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:56:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=525, Unknown=1, NotChecked=0, Total=600 [2022-11-23 13:56:08,843 INFO L87 Difference]: Start difference. First operand 208 states and 246 transitions. Second operand has 21 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:56:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:10,049 INFO L93 Difference]: Finished difference Result 229 states and 268 transitions. [2022-11-23 13:56:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:56:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-11-23 13:56:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:10,051 INFO L225 Difference]: With dead ends: 229 [2022-11-23 13:56:10,051 INFO L226 Difference]: Without dead ends: 229 [2022-11-23 13:56:10,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=119, Invalid=750, Unknown=1, NotChecked=0, Total=870 [2022-11-23 13:56:10,052 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 58 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:10,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 645 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:56:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-23 13:56:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2022-11-23 13:56:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 177 states have (on average 1.2485875706214689) internal successors, (221), 187 states have internal predecessors, (221), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:56:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2022-11-23 13:56:10,065 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 41 [2022-11-23 13:56:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:10,065 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2022-11-23 13:56:10,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:56:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2022-11-23 13:56:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 13:56:10,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:10,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:10,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:10,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (76)] Ended with exit code 0 [2022-11-23 13:56:10,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:10,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:10,673 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:56:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:10,674 INFO L85 PathProgramCache]: Analyzing trace with hash -503073279, now seen corresponding path program 1 times [2022-11-23 13:56:10,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:10,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620106736] [2022-11-23 13:56:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:10,674 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 [2022-11-23 13:56:10,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:10,675 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:56:10,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (79)] Waiting until timeout for monitored process [2022-11-23 13:56:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 13:56:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:10,880 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 [2022-11-23 13:56:11,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-23 13:56:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:56:11,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:56:12,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:56:12,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620106736] [2022-11-23 13:56:12,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620106736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:12,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418415956] [2022-11-23 13:56:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:12,660 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:12,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:56:12,661 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:56:12,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-23 13:56:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:56:12,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:56:13,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:56:13,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [418415956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:13,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23998829] [2022-11-23 13:56:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:13,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:13,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:13,581 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:13,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-23 13:56:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:13,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:56:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:56:13,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:56:14,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23998829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:14,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:56:14,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12, 9, 12, 9] total 33 [2022-11-23 13:56:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134232074] [2022-11-23 13:56:14,077 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:56:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 13:56:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:56:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 13:56:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 13:56:14,079 INFO L87 Difference]: Start difference. First operand 202 states and 241 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 13:56:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:17,358 INFO L93 Difference]: Finished difference Result 415 states and 461 transitions. [2022-11-23 13:56:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 13:56:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-11-23 13:56:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:17,360 INFO L225 Difference]: With dead ends: 415 [2022-11-23 13:56:17,360 INFO L226 Difference]: Without dead ends: 415 [2022-11-23 13:56:17,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=601, Invalid=2479, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 13:56:17,362 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1609 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:17,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 1260 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 13:56:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-23 13:56:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 193. [2022-11-23 13:56:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 168 states have (on average 1.244047619047619) internal successors, (209), 178 states have internal predecessors, (209), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:56:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 229 transitions. [2022-11-23 13:56:17,369 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 229 transitions. Word has length 41 [2022-11-23 13:56:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:17,369 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 229 transitions. [2022-11-23 13:56:17,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 13:56:17,370 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 229 transitions. [2022-11-23 13:56:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 13:56:17,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:17,371 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:17,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (79)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:17,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2022-11-23 13:56:17,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:17,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:17,983 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:56:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2062437122, now seen corresponding path program 1 times [2022-11-23 13:56:17,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:17,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653997052] [2022-11-23 13:56:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:17,984 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 [2022-11-23 13:56:17,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:17,985 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:56:17,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (82)] Waiting until timeout for monitored process [2022-11-23 13:56:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:18,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:56:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:18,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:56:18,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:56:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 13:56:18,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 13:56:18,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:56:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653997052] [2022-11-23 13:56:18,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653997052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [691268336] [2022-11-23 13:56:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:18,781 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:18,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:56:18,782 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:56:18,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-23 13:56:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:56:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:19,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:56:19,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:56:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 13:56:19,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 13:56:19,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [691268336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796281193] [2022-11-23 13:56:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:19,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:19,346 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:19,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-23 13:56:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 13:56:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:19,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:56:19,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:56:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 13:56:19,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 13:56:19,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796281193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:19,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:56:19,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 12, 8, 12, 8] total 17 [2022-11-23 13:56:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046339723] [2022-11-23 13:56:19,847 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:56:19,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 13:56:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:56:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 13:56:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:56:19,848 INFO L87 Difference]: Start difference. First operand 193 states and 229 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 13:56:22,045 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 [0] [2022-11-23 13:56:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:23,647 INFO L93 Difference]: Finished difference Result 287 states and 318 transitions. [2022-11-23 13:56:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 13:56:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-11-23 13:56:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:23,650 INFO L225 Difference]: With dead ends: 287 [2022-11-23 13:56:23,650 INFO L226 Difference]: Without dead ends: 287 [2022-11-23 13:56:23,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 226 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 13:56:23,651 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 582 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:23,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 904 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 13:56:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-23 13:56:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 195. [2022-11-23 13:56:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 170 states have (on average 1.2411764705882353) internal successors, (211), 180 states have internal predecessors, (211), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:56:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 231 transitions. [2022-11-23 13:56:23,656 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 231 transitions. Word has length 42 [2022-11-23 13:56:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:23,657 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 231 transitions. [2022-11-23 13:56:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 13:56:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 231 transitions. [2022-11-23 13:56:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 13:56:23,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:23,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:23,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (82)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:23,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:24,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:24,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:24,270 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:56:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -752641937, now seen corresponding path program 1 times [2022-11-23 13:56:24,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:24,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598668206] [2022-11-23 13:56:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:24,271 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 [2022-11-23 13:56:24,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:24,272 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:56:24,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (85)] Waiting until timeout for monitored process [2022-11-23 13:56:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:24,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:56:24,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:24,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 13:56:24,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 13:56:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:24,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:28,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-23 13:56:28,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-23 13:56:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:56:28,908 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:56:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598668206] [2022-11-23 13:56:28,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598668206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [898163464] [2022-11-23 13:56:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:28,909 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:28,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:56:28,911 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:56:28,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-23 13:56:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:29,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 13:56:29,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:29,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 13:56:29,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:56:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:29,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:29,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-23 13:56:29,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-23 13:56:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:56:29,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [898163464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:29,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512000600] [2022-11-23 13:56:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:29,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:29,862 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:29,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-23 13:56:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:30,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 13:56:30,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:30,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 13:56:30,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:56:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:30,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:30,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-23 13:56:30,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-23 13:56:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:56:30,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512000600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:30,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:56:30,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11, 7, 11, 7] total 21 [2022-11-23 13:56:30,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825554182] [2022-11-23 13:56:30,435 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:56:30,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 13:56:30,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:56:30,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 13:56:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=393, Unknown=2, NotChecked=0, Total=462 [2022-11-23 13:56:30,437 INFO L87 Difference]: Start difference. First operand 195 states and 231 transitions. Second operand has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 13:56:33,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:56:35,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:56:37,408 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 [0] [2022-11-23 13:56:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:37,849 INFO L93 Difference]: Finished difference Result 248 states and 280 transitions. [2022-11-23 13:56:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 13:56:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-11-23 13:56:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:37,851 INFO L225 Difference]: With dead ends: 248 [2022-11-23 13:56:37,851 INFO L226 Difference]: Without dead ends: 248 [2022-11-23 13:56:37,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=200, Invalid=1058, Unknown=2, NotChecked=0, Total=1260 [2022-11-23 13:56:37,852 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 205 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:37,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1006 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 493 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 13:56:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-23 13:56:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 199. [2022-11-23 13:56:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.2369942196531791) internal successors, (214), 184 states have internal predecessors, (214), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 13:56:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 234 transitions. [2022-11-23 13:56:37,858 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 234 transitions. Word has length 41 [2022-11-23 13:56:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:37,858 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 234 transitions. [2022-11-23 13:56:37,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 13:56:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 234 transitions. [2022-11-23 13:56:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 13:56:37,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:37,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:37,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:38,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (85)] Ended with exit code 0 [2022-11-23 13:56:38,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:38,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:38,463 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:56:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:38,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1671328571, now seen corresponding path program 3 times [2022-11-23 13:56:38,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:38,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807944371] [2022-11-23 13:56:38,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:56:38,464 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 [2022-11-23 13:56:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:38,464 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:56:38,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (88)] Waiting until timeout for monitored process [2022-11-23 13:56:38,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:56:38,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:56:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 13:56:38,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:38,665 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 [2022-11-23 13:56:38,671 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 5 [2022-11-23 13:56:39,116 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1395 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1395))))) is different from true [2022-11-23 13:56:39,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:39,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:56:39,163 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:39,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:39,442 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1396 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1396))))) is different from true [2022-11-23 13:56:39,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:39,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:56:39,484 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:39,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 6 not checked. [2022-11-23 13:56:39,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:44,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:56:44,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807944371] [2022-11-23 13:56:44,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807944371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:44,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760630440] [2022-11-23 13:56:44,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:56:44,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:44,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:56:44,048 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:56:44,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-23 13:56:44,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:56:44,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:56:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 13:56:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:44,378 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 [2022-11-23 13:56:44,383 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 [2022-11-23 13:56:44,687 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1432 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1432))))) is different from true [2022-11-23 13:56:44,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:44,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:56:44,720 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:44,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:44,860 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1433 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1433) |c_#length|)))) is different from true [2022-11-23 13:56:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:44,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:56:44,895 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:44,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 6 not checked. [2022-11-23 13:56:44,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:49,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [760630440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:49,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243913247] [2022-11-23 13:56:49,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:56:49,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:49,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:49,264 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:49,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-23 13:56:49,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:56:49,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:56:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 13:56:49,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:49,471 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 [2022-11-23 13:56:49,478 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 [2022-11-23 13:56:49,781 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1469 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1469) |c_#length|)))) is different from true [2022-11-23 13:56:49,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:49,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:56:49,812 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:49,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:49,962 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1470 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1470))))) is different from true [2022-11-23 13:56:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:49,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:56:50,003 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:50,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:56:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 6 not checked. [2022-11-23 13:56:50,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:50,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243913247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:50,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:56:50,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 20 [2022-11-23 13:56:50,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394184003] [2022-11-23 13:56:50,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:56:50,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:56:50,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:56:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:56:50,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=233, Unknown=7, NotChecked=210, Total=506 [2022-11-23 13:56:50,342 INFO L87 Difference]: Start difference. First operand 199 states and 234 transitions. Second operand has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 13:56:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:52,373 INFO L93 Difference]: Finished difference Result 261 states and 289 transitions. [2022-11-23 13:56:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 13:56:52,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 42 [2022-11-23 13:56:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:52,375 INFO L225 Difference]: With dead ends: 261 [2022-11-23 13:56:52,375 INFO L226 Difference]: Without dead ends: 261 [2022-11-23 13:56:52,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=170, Invalid=717, Unknown=7, NotChecked=366, Total=1260 [2022-11-23 13:56:52,376 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 454 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 721 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:52,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 586 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 585 Invalid, 0 Unknown, 721 Unchecked, 1.2s Time] [2022-11-23 13:56:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-23 13:56:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 187. [2022-11-23 13:56:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.2453987730061349) internal successors, (203), 174 states have internal predecessors, (203), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 13:56:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 217 transitions. [2022-11-23 13:56:52,381 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 217 transitions. Word has length 42 [2022-11-23 13:56:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:52,381 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 217 transitions. [2022-11-23 13:56:52,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 13:56:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 217 transitions. [2022-11-23 13:56:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 13:56:52,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:52,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:52,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (88)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:52,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:52,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-23 13:56:52,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:52,994 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:56:52,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1199661072, now seen corresponding path program 1 times [2022-11-23 13:56:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:52,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832720877] [2022-11-23 13:56:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:52,995 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 [2022-11-23 13:56:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:52,996 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:56:52,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (91)] Waiting until timeout for monitored process [2022-11-23 13:56:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 13:56:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:53,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:56:53,446 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 13:56:53,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:56:53,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:56:53,917 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((v_ArrVal_1484 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_1484) (_ bv0 32) (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1))))) is different from true [2022-11-23 13:56:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:53,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:54,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-23 13:56:54,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-23 13:57:02,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:57:02,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832720877] [2022-11-23 13:57:02,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832720877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:57:02,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1177631597] [2022-11-23 13:57:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:02,820 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:02,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:57:02,821 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:57:02,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-23 13:57:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:03,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 13:57:03,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:03,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:57:03,647 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 13:57:03,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:57:04,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:57:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:04,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:04,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-23 13:57:04,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-23 13:57:04,598 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1509 (_ BitVec 1)) (v_arrayElimCell_158 (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret45#1.base_158| (_ BitVec 32)) (v_antiDerIndex_entry0_1 (_ BitVec 32))) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1)) (.cse1 (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_158| v_ArrVal_1509))) (or (= (bvadd .cse0 (select (store (store .cse1 (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret45#1.base_158| (_ bv0 1)) v_antiDerIndex_entry0_1)) (_ bv0 1)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_158|))) (= (bvadd .cse0 (select (store (store .cse1 v_arrayElimCell_158 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret45#1.base_158| (_ bv0 1)) v_antiDerIndex_entry0_1)) (_ bv0 1))))) is different from false [2022-11-23 13:57:04,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1177631597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:57:04,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639764397] [2022-11-23 13:57:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:04,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:04,612 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:04,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-23 13:57:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:04,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 13:57:04,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:04,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:57:05,008 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 13:57:05,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:57:05,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:57:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:05,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:05,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-23 13:57:05,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-23 13:57:16,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639764397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:57:16,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:57:16,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-23 13:57:16,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830385270] [2022-11-23 13:57:16,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:16,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 13:57:16,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:57:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 13:57:16,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=867, Unknown=10, NotChecked=122, Total=1122 [2022-11-23 13:57:16,426 INFO L87 Difference]: Start difference. First operand 187 states and 217 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:57:26,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:26,367 INFO L93 Difference]: Finished difference Result 205 states and 234 transitions. [2022-11-23 13:57:26,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 13:57:26,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-11-23 13:57:26,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:26,369 INFO L225 Difference]: With dead ends: 205 [2022-11-23 13:57:26,369 INFO L226 Difference]: Without dead ends: 186 [2022-11-23 13:57:26,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 179 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=270, Invalid=1704, Unknown=14, NotChecked=174, Total=2162 [2022-11-23 13:57:26,370 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 181 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:26,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 426 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 435 Invalid, 0 Unknown, 87 Unchecked, 1.0s Time] [2022-11-23 13:57:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-23 13:57:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2022-11-23 13:57:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 158 states have (on average 1.2468354430379747) internal successors, (197), 170 states have internal predecessors, (197), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 13:57:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 210 transitions. [2022-11-23 13:57:26,375 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 210 transitions. Word has length 42 [2022-11-23 13:57:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:26,375 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 210 transitions. [2022-11-23 13:57:26,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:57:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 210 transitions. [2022-11-23 13:57:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 13:57:26,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:26,376 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:26,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (91)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:26,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-23 13:57:26,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2022-11-23 13:57:26,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:26,988 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:57:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash -488958544, now seen corresponding path program 1 times [2022-11-23 13:57:26,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:57:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762024647] [2022-11-23 13:57:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:26,989 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 [2022-11-23 13:57:26,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:57:26,990 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:57:26,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (94)] Waiting until timeout for monitored process [2022-11-23 13:57:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:27,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 13:57:27,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:27,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:57:28,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:57:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:57:28,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 13:57:28,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:57:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762024647] [2022-11-23 13:57:28,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762024647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751900610] [2022-11-23 13:57:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:28,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:57:28,784 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:57:28,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-23 13:57:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:29,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:57:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:29,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:57:29,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:57:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:57:29,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 13:57:29,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751900610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:29,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688419207] [2022-11-23 13:57:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:29,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:29,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:29,984 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:29,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-23 13:57:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 13:57:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:30,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:57:30,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:57:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:57:30,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 13:57:30,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688419207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:30,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:57:30,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 13, 8, 13, 8] total 32 [2022-11-23 13:57:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676145618] [2022-11-23 13:57:30,690 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:30,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 13:57:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:57:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 13:57:30,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 13:57:30,693 INFO L87 Difference]: Start difference. First operand 182 states and 210 transitions. Second operand has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 13:57:32,825 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 [0] [2022-11-23 13:57:35,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:57:37,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:57:39,376 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 [0] [2022-11-23 13:57:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:44,345 INFO L93 Difference]: Finished difference Result 258 states and 282 transitions. [2022-11-23 13:57:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 13:57:44,347 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 43 [2022-11-23 13:57:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:44,349 INFO L225 Difference]: With dead ends: 258 [2022-11-23 13:57:44,349 INFO L226 Difference]: Without dead ends: 258 [2022-11-23 13:57:44,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=407, Invalid=2245, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 13:57:44,349 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 630 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 43 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:44,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1174 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 980 Invalid, 4 Unknown, 0 Unchecked, 11.3s Time] [2022-11-23 13:57:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-23 13:57:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 184. [2022-11-23 13:57:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.24375) internal successors, (199), 172 states have internal predecessors, (199), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 13:57:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 212 transitions. [2022-11-23 13:57:44,354 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 212 transitions. Word has length 43 [2022-11-23 13:57:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:44,354 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 212 transitions. [2022-11-23 13:57:44,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 13:57:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 212 transitions. [2022-11-23 13:57:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 13:57:44,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:44,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:44,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:44,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (94)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:44,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2022-11-23 13:57:44,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:44,962 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:57:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:44,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1857063425, now seen corresponding path program 1 times [2022-11-23 13:57:44,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:57:44,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781184753] [2022-11-23 13:57:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:44,963 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 [2022-11-23 13:57:44,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:57:44,964 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:57:44,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (97)] Waiting until timeout for monitored process [2022-11-23 13:57:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:57:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:45,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 13:57:45,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 13:57:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:45,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:45,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-23 13:57:45,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-23 13:57:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:57:46,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:57:46,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781184753] [2022-11-23 13:57:46,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781184753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:46,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [315389559] [2022-11-23 13:57:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:46,052 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:57:46,053 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:57:46,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-23 13:57:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 13:57:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:46,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 13:57:47,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:57:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:47,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:47,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-23 13:57:47,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-23 13:57:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:57:47,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [315389559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141879551] [2022-11-23 13:57:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:47,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:47,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:47,971 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:47,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-23 13:57:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:57:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:48,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 13:57:49,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 13:57:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:49,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:49,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-23 13:57:49,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-23 13:57:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:57:49,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141879551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:49,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:57:49,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 8, 11, 8] total 34 [2022-11-23 13:57:49,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919776557] [2022-11-23 13:57:49,435 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:49,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 13:57:49,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:57:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 13:57:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 13:57:49,437 INFO L87 Difference]: Start difference. First operand 184 states and 212 transitions. Second operand has 35 states, 34 states have (on average 4.0) internal successors, (136), 33 states have internal predecessors, (136), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 13:57:51,675 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 [0] [2022-11-23 13:57:53,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:57:56,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:57:58,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:58:01,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:58:03,565 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 [0] [2022-11-23 13:58:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:03,987 INFO L93 Difference]: Finished difference Result 215 states and 241 transitions. [2022-11-23 13:58:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 13:58:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.0) internal successors, (136), 33 states have internal predecessors, (136), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 42 [2022-11-23 13:58:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:03,989 INFO L225 Difference]: With dead ends: 215 [2022-11-23 13:58:03,990 INFO L226 Difference]: Without dead ends: 213 [2022-11-23 13:58:03,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 210 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 13:58:03,990 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 338 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 22 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:03,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 745 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 732 Invalid, 6 Unknown, 0 Unchecked, 13.7s Time] [2022-11-23 13:58:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-23 13:58:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2022-11-23 13:58:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.2363636363636363) internal successors, (204), 177 states have internal predecessors, (204), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 13:58:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 217 transitions. [2022-11-23 13:58:03,995 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 217 transitions. Word has length 42 [2022-11-23 13:58:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:03,995 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 217 transitions. [2022-11-23 13:58:03,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.0) internal successors, (136), 33 states have internal predecessors, (136), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 13:58:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 217 transitions. [2022-11-23 13:58:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 13:58:03,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:03,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:04,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:04,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:04,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (97)] Ended with exit code 0 [2022-11-23 13:58:04,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 13:58:04,611 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:58:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -591810866, now seen corresponding path program 1 times [2022-11-23 13:58:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:58:04,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976967468] [2022-11-23 13:58:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:04,612 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 [2022-11-23 13:58:04,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:58:04,612 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:58:04,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (100)] Waiting until timeout for monitored process [2022-11-23 13:58:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:04,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 13:58:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:05,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:58:05,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-23 13:58:17,307 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (exists ((|v_ULTIMATE.start_free_17_#t~mem43#1.base_115| (_ BitVec 32)) (v_ArrVal_1675 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_1675))) (and (= (store (store .cse0 |v_ULTIMATE.start_free_17_#t~mem43#1.base_115| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_free_17_#t~mem43#1.base_115|))))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) is different from true [2022-11-23 13:58:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:58:17,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:19,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2022-11-23 13:58:36,426 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:58:36,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:58:36,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976967468] [2022-11-23 13:58:36,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976967468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:36,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1173198143] [2022-11-23 13:58:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:36,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:58:36,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:58:36,428 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:58:36,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-23 13:58:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 13:58:36,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:40,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:58:40,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-23 13:58:40,983 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (not (= |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 32))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1))))) is different from true [2022-11-23 13:58:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:40,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:45,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 108 [2022-11-23 13:59:04,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1173198143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:59:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283085072] [2022-11-23 13:59:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:04,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:59:04,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:59:04,058 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:59:04,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-23 13:59:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:04,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 13:59:04,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:59:09,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:59:09,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-23 13:59:09,793 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 13:59:09,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 29 [2022-11-23 13:59:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:59:14,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:59:14,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2022-11-23 13:59:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283085072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:59:45,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:59:45,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 36 [2022-11-23 13:59:45,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589381284] [2022-11-23 13:59:45,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:59:45,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 13:59:45,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:59:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 13:59:45,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2198, Unknown=33, NotChecked=194, Total=2652 [2022-11-23 13:59:45,356 INFO L87 Difference]: Start difference. First operand 190 states and 217 transitions. Second operand has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 13:59:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:50,124 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2022-11-23 13:59:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 13:59:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-11-23 13:59:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:50,126 INFO L225 Difference]: With dead ends: 194 [2022-11-23 13:59:50,126 INFO L226 Difference]: Without dead ends: 167 [2022-11-23 13:59:50,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 99.1s TimeCoverageRelationStatistics Valid=455, Invalid=3810, Unknown=33, NotChecked=258, Total=4556 [2022-11-23 13:59:50,127 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 218 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:50,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 584 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 800 Invalid, 0 Unknown, 188 Unchecked, 2.5s Time] [2022-11-23 13:59:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-23 13:59:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-11-23 13:59:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 142 states have (on average 1.267605633802817) internal successors, (180), 154 states have internal predecessors, (180), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 13:59:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2022-11-23 13:59:50,131 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 43 [2022-11-23 13:59:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:50,134 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2022-11-23 13:59:50,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 13:59:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2022-11-23 13:59:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 13:59:50,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:50,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:59:50,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (101)] Forceful destruction successful, exit code 0 [2022-11-23 13:59:50,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (100)] Forceful destruction successful, exit code 0 [2022-11-23 13:59:50,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-23 13:59:50,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:59:50,740 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:59:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:50,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2022154436, now seen corresponding path program 1 times [2022-11-23 13:59:50,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:59:50,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234133394] [2022-11-23 13:59:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:50,741 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 [2022-11-23 13:59:50,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:59:50,742 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:59:50,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (103)] Waiting until timeout for monitored process [2022-11-23 13:59:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 13:59:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:59:51,000 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 [2022-11-23 13:59:51,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:59:51,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 13:59:51,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 13:59:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:59:51,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:59:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:59:51,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:59:51,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234133394] [2022-11-23 13:59:51,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234133394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:59:51,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1656692587] [2022-11-23 13:59:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:51,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:59:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:59:51,822 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:59:51,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-23 13:59:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 13:59:52,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:59:52,188 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 [2022-11-23 13:59:52,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:59:52,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 13:59:52,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 13:59:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:59:52,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:59:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:59:54,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1656692587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:59:54,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778286892] [2022-11-23 13:59:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:54,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:59:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:59:54,584 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:59:54,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-23 13:59:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 13:59:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:59:54,825 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 [2022-11-23 13:59:54,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:59:54,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 13:59:54,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 13:59:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:59:54,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:59:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:59:55,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778286892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:59:55,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:59:55,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 13, 9, 13, 9] total 20 [2022-11-23 13:59:55,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603018393] [2022-11-23 13:59:55,198 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:59:55,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:59:55,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:59:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:59:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=369, Unknown=1, NotChecked=0, Total=420 [2022-11-23 13:59:55,198 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 13:59:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:57,432 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2022-11-23 13:59:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 13:59:57,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-23 13:59:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:57,434 INFO L225 Difference]: With dead ends: 203 [2022-11-23 13:59:57,434 INFO L226 Difference]: Without dead ends: 203 [2022-11-23 13:59:57,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=187, Invalid=1294, Unknown=1, NotChecked=0, Total=1482 [2022-11-23 13:59:57,434 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 209 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:57,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 613 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 13:59:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-23 13:59:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 167. [2022-11-23 13:59:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 144 states have (on average 1.2638888888888888) internal successors, (182), 156 states have internal predecessors, (182), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 13:59:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2022-11-23 13:59:57,438 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 44 [2022-11-23 13:59:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:57,439 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2022-11-23 13:59:57,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 13:59:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2022-11-23 13:59:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 13:59:57,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:57,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:59:57,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (104)] Forceful destruction successful, exit code 0 [2022-11-23 13:59:57,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (103)] Forceful destruction successful, exit code 0 [2022-11-23 13:59:57,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-11-23 13:59:58,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:59:58,044 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 13:59:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1737721805, now seen corresponding path program 1 times [2022-11-23 13:59:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:59:58,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914035377] [2022-11-23 13:59:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:58,044 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 [2022-11-23 13:59:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:59:58,045 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 13:59:58,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (106)] Waiting until timeout for monitored process [2022-11-23 13:59:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 13:59:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:59:58,247 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 [2022-11-23 13:59:58,464 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:59:58,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 13:59:58,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 13:59:58,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 14:00:02,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-23 14:00:03,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:00:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:00:03,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:00:04,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:00:04,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914035377] [2022-11-23 14:00:04,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914035377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:04,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [884329460] [2022-11-23 14:00:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:04,072 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:00:04,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:00:04,076 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:00:04,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-23 14:00:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:04,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:00:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:04,432 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 [2022-11-23 14:00:04,583 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:00:04,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:00:04,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:00:04,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 14:00:06,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-23 14:00:07,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:00:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:00:07,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:11,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:00:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:00:11,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [884329460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:11,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057059759] [2022-11-23 14:00:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:11,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:00:11,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:00:11,687 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:00:11,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-23 14:00:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:11,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:00:11,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:11,905 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 [2022-11-23 14:00:12,033 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:00:12,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:00:12,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:00:14,228 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_91| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_91|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_91|))) is different from true [2022-11-23 14:00:14,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-23 14:00:14,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:00:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2022-11-23 14:00:14,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:14,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:00:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:00:15,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057059759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:15,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:00:15,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 13] total 39 [2022-11-23 14:00:15,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531191875] [2022-11-23 14:00:15,157 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:00:15,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 14:00:15,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:00:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 14:00:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=4, NotChecked=74, Total=1560 [2022-11-23 14:00:15,159 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:00:17,210 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 [0] [2022-11-23 14:00:19,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:00:21,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:00:23,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:00:35,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:00:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:37,977 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2022-11-23 14:00:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 14:00:37,978 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) Word has length 45 [2022-11-23 14:00:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:37,980 INFO L225 Difference]: With dead ends: 239 [2022-11-23 14:00:37,980 INFO L226 Difference]: Without dead ends: 239 [2022-11-23 14:00:37,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 213 SyntacticMatches, 17 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=421, Invalid=3483, Unknown=6, NotChecked=122, Total=4032 [2022-11-23 14:00:37,981 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 372 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 38 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:37,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1537 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1180 Invalid, 5 Unknown, 158 Unchecked, 12.5s Time] [2022-11-23 14:00:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-23 14:00:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 175. [2022-11-23 14:00:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 150 states have (on average 1.26) internal successors, (189), 163 states have internal predecessors, (189), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:00:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 200 transitions. [2022-11-23 14:00:37,985 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 200 transitions. Word has length 45 [2022-11-23 14:00:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:37,985 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 200 transitions. [2022-11-23 14:00:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:00:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 200 transitions. [2022-11-23 14:00:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:00:37,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:37,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:37,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:38,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (107)] Ended with exit code 0 [2022-11-23 14:00:38,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (106)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:38,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:00:38,592 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:00:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1988382823, now seen corresponding path program 2 times [2022-11-23 14:00:38,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:00:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605347471] [2022-11-23 14:00:38,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:00:38,592 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 [2022-11-23 14:00:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:00:38,593 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:00:38,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (109)] Waiting until timeout for monitored process [2022-11-23 14:00:38,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:00:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:38,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:00:38,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:38,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:00:39,229 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:00:39,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 14:00:39,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:00:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:00:39,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:39,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:00:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:00:40,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:00:40,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605347471] [2022-11-23 14:00:40,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605347471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:40,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442663949] [2022-11-23 14:00:40,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:00:40,126 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:00:40,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:00:40,127 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:00:40,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-23 14:00:40,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:00:40,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:00:40,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:40,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:00:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:41,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 14:00:41,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:00:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:00:41,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:43,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [442663949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:00:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453900353] [2022-11-23 14:00:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:00:43,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:00:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:00:43,830 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:00:43,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-23 14:00:44,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:00:44,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:44,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 14:00:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:44,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:00:44,735 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:00:44,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 14:00:44,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:00:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:00:44,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:49,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:00:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:00:49,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453900353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:49,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-23 14:00:49,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 14, 15, 11] total 36 [2022-11-23 14:00:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857465540] [2022-11-23 14:00:49,362 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-23 14:00:49,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 14:00:49,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:00:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 14:00:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1222, Unknown=3, NotChecked=0, Total=1406 [2022-11-23 14:00:49,363 INFO L87 Difference]: Start difference. First operand 175 states and 200 transitions. Second operand has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 30 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-23 14:00:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:52,878 INFO L93 Difference]: Finished difference Result 231 states and 250 transitions. [2022-11-23 14:00:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:00:52,878 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 30 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 46 [2022-11-23 14:00:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:52,879 INFO L225 Difference]: With dead ends: 231 [2022-11-23 14:00:52,879 INFO L226 Difference]: Without dead ends: 231 [2022-11-23 14:00:52,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=495, Invalid=2582, Unknown=3, NotChecked=0, Total=3080 [2022-11-23 14:00:52,880 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 414 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:52,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 811 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 14:00:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-23 14:00:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2022-11-23 14:00:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 152 states have (on average 1.269736842105263) internal successors, (193), 165 states have internal predecessors, (193), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:00:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 204 transitions. [2022-11-23 14:00:52,884 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 204 transitions. Word has length 46 [2022-11-23 14:00:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:52,885 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 204 transitions. [2022-11-23 14:00:52,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 30 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-23 14:00:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 204 transitions. [2022-11-23 14:00:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 14:00:52,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:52,886 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:52,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-23 14:00:53,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-23 14:00:53,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (109)] Ended with exit code 0 [2022-11-23 14:00:53,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:00:53,487 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:00:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:53,487 INFO L85 PathProgramCache]: Analyzing trace with hash 351491110, now seen corresponding path program 3 times [2022-11-23 14:00:53,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:00:53,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519250167] [2022-11-23 14:00:53,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:00:53,487 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 [2022-11-23 14:00:53,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:00:53,488 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:00:53,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (112)] Waiting until timeout for monitored process [2022-11-23 14:00:53,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 14:00:53,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:53,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 14:00:53,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:53,846 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 [2022-11-23 14:00:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:00:55,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:01:04,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:01:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519250167] [2022-11-23 14:01:04,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519250167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:01:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691515733] [2022-11-23 14:01:04,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:01:04,097 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:01:04,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:01:04,100 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:01:04,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-23 14:01:04,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 14:01:04,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:01:04,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 14:01:04,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:04,705 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 [2022-11-23 14:01:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:01:06,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:01:26,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1691515733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:01:26,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745526978] [2022-11-23 14:01:26,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:01:26,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:26,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:26,393 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:26,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-23 14:01:28,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 14:01:28,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:01:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 14:01:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:28,541 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 [2022-11-23 14:01:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:01:29,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:01:32,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745526978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:01:32,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:01:32,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 26, 24, 21, 19] total 67 [2022-11-23 14:01:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163992543] [2022-11-23 14:01:32,305 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:01:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-23 14:01:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:01:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-23 14:01:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=3629, Unknown=0, NotChecked=0, Total=4556 [2022-11-23 14:01:32,307 INFO L87 Difference]: Start difference. First operand 177 states and 204 transitions. Second operand has 68 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:04:23,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:23,952 INFO L93 Difference]: Finished difference Result 267 states and 342 transitions. [2022-11-23 14:04:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-23 14:04:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-11-23 14:04:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:23,956 INFO L225 Difference]: With dead ends: 267 [2022-11-23 14:04:23,956 INFO L226 Difference]: Without dead ends: 267 [2022-11-23 14:04:23,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 186 SyntacticMatches, 6 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4914 ImplicationChecksByTransitivity, 179.0s TimeCoverageRelationStatistics Valid=3888, Invalid=13140, Unknown=2, NotChecked=0, Total=17030 [2022-11-23 14:04:23,958 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1600 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:23,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 1387 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2022-11-23 14:04:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-23 14:04:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 213. [2022-11-23 14:04:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 188 states have (on average 1.2819148936170213) internal successors, (241), 201 states have internal predecessors, (241), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:04:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 252 transitions. [2022-11-23 14:04:23,965 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 252 transitions. Word has length 44 [2022-11-23 14:04:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:23,965 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 252 transitions. [2022-11-23 14:04:23,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:04:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 252 transitions. [2022-11-23 14:04:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:04:23,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:23,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:04:23,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (112)] Ended with exit code 0 [2022-11-23 14:04:24,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-11-23 14:04:24,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-11-23 14:04:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:04:24,580 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:04:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1510325227, now seen corresponding path program 2 times [2022-11-23 14:04:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:04:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19941034] [2022-11-23 14:04:24,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:04:24,581 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 [2022-11-23 14:04:24,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:04:24,582 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:04:24,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (115)] Waiting until timeout for monitored process [2022-11-23 14:04:24,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:04:24,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:04:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:04:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:25,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:04:25,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 14:04:25,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:04:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:04:25,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:04:26,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:04:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19941034] [2022-11-23 14:04:26,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19941034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1895955729] [2022-11-23 14:04:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:04:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:04:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:04:26,232 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:04:26,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-23 14:04:26,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:04:26,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:04:26,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:04:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:27,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:04:27,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:04:27,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 14:04:27,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:04:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:04:27,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:04:28,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1895955729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:28,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373479429] [2022-11-23 14:04:28,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:04:28,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:28,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:28,045 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:28,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-23 14:04:28,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:04:28,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:04:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:04:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:28,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:04:28,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:04:28,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 14:04:28,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:04:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:04:28,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:04:29,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373479429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:29,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:04:29,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 23 [2022-11-23 14:04:29,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442466072] [2022-11-23 14:04:29,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:04:29,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 14:04:29,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:04:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 14:04:29,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:04:29,523 INFO L87 Difference]: Start difference. First operand 213 states and 252 transitions. Second operand has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 14:04:31,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:04:34,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:04:37,287 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 [0] [2022-11-23 14:04:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:38,461 INFO L93 Difference]: Finished difference Result 326 states and 363 transitions. [2022-11-23 14:04:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:04:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2022-11-23 14:04:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:38,463 INFO L225 Difference]: With dead ends: 326 [2022-11-23 14:04:38,463 INFO L226 Difference]: Without dead ends: 326 [2022-11-23 14:04:38,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 14:04:38,464 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 318 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:38,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 832 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 947 Invalid, 3 Unknown, 0 Unchecked, 8.3s Time] [2022-11-23 14:04:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-23 14:04:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 244. [2022-11-23 14:04:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 216 states have (on average 1.2962962962962963) internal successors, (280), 230 states have internal predecessors, (280), 5 states have call successors, (5), 5 states have call predecessors, (5), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 14:04:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 294 transitions. [2022-11-23 14:04:38,470 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 294 transitions. Word has length 47 [2022-11-23 14:04:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:38,470 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 294 transitions. [2022-11-23 14:04:38,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 14:04:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 294 transitions. [2022-11-23 14:04:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:04:38,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:38,471 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:04:38,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (115)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:38,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:38,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (116)] Ended with exit code 0 [2022-11-23 14:04:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:04:39,084 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:04:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:39,084 INFO L85 PathProgramCache]: Analyzing trace with hash -791017244, now seen corresponding path program 2 times [2022-11-23 14:04:39,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:04:39,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196982912] [2022-11-23 14:04:39,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:04:39,085 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 [2022-11-23 14:04:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:04:39,086 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:04:39,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (118)] Waiting until timeout for monitored process [2022-11-23 14:04:39,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:04:39,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:04:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:04:39,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:39,350 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 [2022-11-23 14:04:39,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-23 14:04:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:04:40,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:04:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:04:41,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:04:41,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196982912] [2022-11-23 14:04:41,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196982912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:04:41,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007127696] [2022-11-23 14:04:41,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:04:41,169 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:04:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:04:41,170 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:04:41,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-23 14:04:41,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:04:41,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:04:41,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:04:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:04:42,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:04:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:04:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007127696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:04:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639084470] [2022-11-23 14:04:42,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:04:42,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:42,491 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:42,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-23 14:04:42,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:04:42,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:04:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:04:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:43,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:04:43,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:04:44,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:04:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:04:44,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:04:46,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-23 14:04:46,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-23 14:04:46,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-23 14:04:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:04:47,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639084470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:04:47,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:04:47,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 13, 10, 12, 11] total 50 [2022-11-23 14:04:47,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744720405] [2022-11-23 14:04:47,480 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:04:47,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-23 14:04:47,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:04:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-23 14:04:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2248, Unknown=1, NotChecked=0, Total=2450 [2022-11-23 14:04:47,481 INFO L87 Difference]: Start difference. First operand 244 states and 294 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 47 states have internal predecessors, (158), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 14:04:49,877 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 [0] [2022-11-23 14:04:52,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:05:01,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:05:05,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:05:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:11,855 INFO L93 Difference]: Finished difference Result 435 states and 514 transitions. [2022-11-23 14:05:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-23 14:05:11,857 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 47 states have internal predecessors, (158), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 46 [2022-11-23 14:05:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:11,858 INFO L225 Difference]: With dead ends: 435 [2022-11-23 14:05:11,858 INFO L226 Difference]: Without dead ends: 435 [2022-11-23 14:05:11,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=1251, Invalid=8449, Unknown=2, NotChecked=0, Total=9702 [2022-11-23 14:05:11,858 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1562 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 123 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:11,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1562 Valid, 1381 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1506 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2022-11-23 14:05:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-23 14:05:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 371. [2022-11-23 14:05:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 339 states have (on average 1.303834808259587) internal successors, (442), 350 states have internal predecessors, (442), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-23 14:05:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 468 transitions. [2022-11-23 14:05:11,864 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 468 transitions. Word has length 46 [2022-11-23 14:05:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:11,865 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 468 transitions. [2022-11-23 14:05:11,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 47 states have internal predecessors, (158), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 14:05:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 468 transitions. [2022-11-23 14:05:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:05:11,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:11,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:11,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:12,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (118)] Ended with exit code 0 [2022-11-23 14:05:12,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2022-11-23 14:05:12,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:05:12,472 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:05:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:12,473 INFO L85 PathProgramCache]: Analyzing trace with hash 424558363, now seen corresponding path program 2 times [2022-11-23 14:05:12,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:05:12,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951512127] [2022-11-23 14:05:12,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:05:12,473 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 [2022-11-23 14:05:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:05:12,474 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:05:12,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (121)] Waiting until timeout for monitored process [2022-11-23 14:05:12,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:05:12,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:12,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:05:12,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:12,833 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 [2022-11-23 14:05:12,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:05:13,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 14:05:13,094 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-23 14:05:13,129 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:05:13,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-23 14:05:13,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:05:13,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 14:05:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 2 not checked. [2022-11-23 14:05:13,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:19,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:05:19,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951512127] [2022-11-23 14:05:19,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951512127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:19,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1611037915] [2022-11-23 14:05:19,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:05:19,717 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:05:19,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:05:19,720 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:05:19,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-11-23 14:05:20,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:05:20,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:20,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:05:20,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:20,465 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 [2022-11-23 14:05:20,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:05:20,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 14:05:20,978 INFO L321 Elim1Store]: treesize reduction 44, result has 26.7 percent of original size [2022-11-23 14:05:20,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 29 [2022-11-23 14:05:21,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:05:21,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:05:21,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 14:05:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2022-11-23 14:05:21,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:27,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1611037915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:27,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97537485] [2022-11-23 14:05:27,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:05:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:27,697 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:27,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-23 14:05:27,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:05:27,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:27,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:05:27,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:28,027 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 [2022-11-23 14:05:28,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:05:28,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 14:05:28,191 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2455 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_2455))))) is different from true [2022-11-23 14:05:28,240 INFO L321 Elim1Store]: treesize reduction 49, result has 38.0 percent of original size [2022-11-23 14:05:28,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 45 [2022-11-23 14:05:28,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:05:28,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:05:28,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 14:05:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 4 not checked. [2022-11-23 14:05:28,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:38,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97537485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:38,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:38,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 24 [2022-11-23 14:05:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642153060] [2022-11-23 14:05:38,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:38,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:05:38,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:05:38,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:05:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=607, Unknown=9, NotChecked=102, Total=812 [2022-11-23 14:05:38,803 INFO L87 Difference]: Start difference. First operand 371 states and 468 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 14:05:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:42,290 INFO L93 Difference]: Finished difference Result 406 states and 503 transitions. [2022-11-23 14:05:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:05:42,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-11-23 14:05:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:42,293 INFO L225 Difference]: With dead ends: 406 [2022-11-23 14:05:42,293 INFO L226 Difference]: Without dead ends: 406 [2022-11-23 14:05:42,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=131, Invalid=860, Unknown=9, NotChecked=122, Total=1122 [2022-11-23 14:05:42,293 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 154 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:42,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 609 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 620 Invalid, 0 Unknown, 248 Unchecked, 1.2s Time] [2022-11-23 14:05:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-23 14:05:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 377. [2022-11-23 14:05:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 345 states have (on average 1.298550724637681) internal successors, (448), 356 states have internal predecessors, (448), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-23 14:05:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 474 transitions. [2022-11-23 14:05:42,300 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 474 transitions. Word has length 48 [2022-11-23 14:05:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:42,300 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 474 transitions. [2022-11-23 14:05:42,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 14:05:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 474 transitions. [2022-11-23 14:05:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 14:05:42,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:42,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:42,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (122)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:42,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (121)] Ended with exit code 0 [2022-11-23 14:05:42,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-11-23 14:05:42,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:42,906 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:05:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -507079458, now seen corresponding path program 4 times [2022-11-23 14:05:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:05:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467558524] [2022-11-23 14:05:42,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:05:42,907 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 [2022-11-23 14:05:42,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:05:42,908 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:05:42,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (124)] Waiting until timeout for monitored process [2022-11-23 14:05:43,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:05:43,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:05:43,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:43,208 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 [2022-11-23 14:05:43,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-23 14:05:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:05:44,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:05:45,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:05:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467558524] [2022-11-23 14:05:45,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467558524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430526120] [2022-11-23 14:05:45,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:05:45,225 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:05:45,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:05:45,226 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:05:45,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (125)] Waiting until timeout for monitored process [2022-11-23 14:05:45,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:05:45,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:45,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:05:45,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:05:46,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:05:46,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1430526120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365809856] [2022-11-23 14:05:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:05:46,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:46,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:46,631 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:46,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-11-23 14:05:46,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:05:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:05:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:05:47,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:05:47,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365809856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:47,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:05:47,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 13, 10, 13, 10] total 29 [2022-11-23 14:05:47,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600268437] [2022-11-23 14:05:47,429 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:47,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 14:05:47,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:05:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 14:05:47,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:05:47,431 INFO L87 Difference]: Start difference. First operand 377 states and 474 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 14:05:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:51,822 INFO L93 Difference]: Finished difference Result 394 states and 451 transitions. [2022-11-23 14:05:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:05:51,824 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 49 [2022-11-23 14:05:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:51,825 INFO L225 Difference]: With dead ends: 394 [2022-11-23 14:05:51,825 INFO L226 Difference]: Without dead ends: 394 [2022-11-23 14:05:51,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 259 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=393, Invalid=1863, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:05:51,826 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 708 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:51,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 1453 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 14:05:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-23 14:05:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 319. [2022-11-23 14:05:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 289 states have (on average 1.273356401384083) internal successors, (368), 301 states have internal predecessors, (368), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 14:05:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 388 transitions. [2022-11-23 14:05:51,832 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 388 transitions. Word has length 49 [2022-11-23 14:05:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:51,833 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 388 transitions. [2022-11-23 14:05:51,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 14:05:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 388 transitions. [2022-11-23 14:05:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:05:51,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:51,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:51,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-11-23 14:05:52,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (124)] Ended with exit code 0 [2022-11-23 14:05:52,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (125)] Ended with exit code 0 [2022-11-23 14:05:52,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:05:52,441 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:05:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1229413940, now seen corresponding path program 1 times [2022-11-23 14:05:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:05:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719637743] [2022-11-23 14:05:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:52,442 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 [2022-11-23 14:05:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:05:52,442 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:05:52,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (127)] Waiting until timeout for monitored process [2022-11-23 14:05:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:05:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:05:52,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:05:52,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:05:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719637743] [2022-11-23 14:05:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719637743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2001888262] [2022-11-23 14:05:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:52,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:05:52,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:05:52,903 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:05:52,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (128)] Waiting until timeout for monitored process [2022-11-23 14:05:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:05:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:05:53,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:05:53,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2001888262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:53,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19184674] [2022-11-23 14:05:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:53,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:53,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:53,448 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:53,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-23 14:05:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:05:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:05:53,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:05:54,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19184674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:54,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:05:54,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2022-11-23 14:05:54,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823187279] [2022-11-23 14:05:54,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:54,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:05:54,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:05:54,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:05:54,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:05:54,035 INFO L87 Difference]: Start difference. First operand 319 states and 388 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 14:05:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:54,357 INFO L93 Difference]: Finished difference Result 385 states and 448 transitions. [2022-11-23 14:05:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:05:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 48 [2022-11-23 14:05:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:54,359 INFO L225 Difference]: With dead ends: 385 [2022-11-23 14:05:54,359 INFO L226 Difference]: Without dead ends: 385 [2022-11-23 14:05:54,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:05:54,360 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 219 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:54,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 653 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:05:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-23 14:05:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 309. [2022-11-23 14:05:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 279 states have (on average 1.2401433691756272) internal successors, (346), 291 states have internal predecessors, (346), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 14:05:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 366 transitions. [2022-11-23 14:05:54,366 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 366 transitions. Word has length 48 [2022-11-23 14:05:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:54,366 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 366 transitions. [2022-11-23 14:05:54,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 14:05:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 366 transitions. [2022-11-23 14:05:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 14:05:54,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:54,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:54,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-11-23 14:05:54,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (128)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:54,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (127)] Ended with exit code 0 [2022-11-23 14:05:54,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:05:54,975 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:05:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:54,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1289498600, now seen corresponding path program 2 times [2022-11-23 14:05:54,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:05:54,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018396674] [2022-11-23 14:05:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:05:54,976 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 [2022-11-23 14:05:54,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:05:54,976 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:05:54,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (130)] Waiting until timeout for monitored process [2022-11-23 14:05:55,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:05:55,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:05:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:55,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:05:55,570 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 6 treesize of output 7 [2022-11-23 14:05:55,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:05:55,762 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 14:05:55,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-23 14:05:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:55,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:56,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:05:56,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 196 [2022-11-23 14:05:56,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-23 14:05:56,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-23 14:05:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:05:56,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:05:56,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018396674] [2022-11-23 14:05:56,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018396674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:56,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [398329686] [2022-11-23 14:05:56,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:05:56,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:05:56,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:05:56,837 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:05:56,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (131)] Waiting until timeout for monitored process [2022-11-23 14:05:57,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:05:57,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102136587] [2022-11-23 14:05:57,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:05:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:57,243 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:57,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (131)] Forceful destruction successful, exit code 1 [2022-11-23 14:05:57,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-23 14:05:57,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:05:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:57,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:05:57,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:57,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:05:58,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:05:58,095 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 14:05:58,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-23 14:05:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:58,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:58,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:05:58,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2022-11-23 14:05:59,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-23 14:05:59,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:05:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:05:59,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102136587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:59,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-23 14:05:59,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 23 [2022-11-23 14:05:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801620823] [2022-11-23 14:05:59,100 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 14:05:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:05:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 14:05:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:05:59,101 INFO L87 Difference]: Start difference. First operand 309 states and 366 transitions. Second operand has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:06:01,321 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 [0] [2022-11-23 14:06:03,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:06:06,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:06:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:07,435 INFO L93 Difference]: Finished difference Result 341 states and 397 transitions. [2022-11-23 14:06:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:06:07,436 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-11-23 14:06:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:07,438 INFO L225 Difference]: With dead ends: 341 [2022-11-23 14:06:07,438 INFO L226 Difference]: Without dead ends: 341 [2022-11-23 14:06:07,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 14:06:07,439 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 193 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:07,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 838 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 534 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2022-11-23 14:06:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-23 14:06:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 315. [2022-11-23 14:06:07,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 285 states have (on average 1.2350877192982457) internal successors, (352), 297 states have internal predecessors, (352), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-23 14:06:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 372 transitions. [2022-11-23 14:06:07,444 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 372 transitions. Word has length 49 [2022-11-23 14:06:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:07,444 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 372 transitions. [2022-11-23 14:06:07,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:06:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 372 transitions. [2022-11-23 14:06:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 14:06:07,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:07,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:07,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:07,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (130)] Ended with exit code 0 [2022-11-23 14:06:07,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:06:07,847 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:06:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash -854565691, now seen corresponding path program 2 times [2022-11-23 14:06:07,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:07,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887503674] [2022-11-23 14:06:07,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:06:07,848 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 [2022-11-23 14:06:07,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:07,849 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:06:07,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/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 (133)] Waiting until timeout for monitored process [2022-11-23 14:06:08,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:06:08,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:06:08,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 14:06:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:08,166 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 [2022-11-23 14:06:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:09,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:17,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887503674] [2022-11-23 14:06:17,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887503674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [817136384] [2022-11-23 14:06:17,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:06:17,772 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:06:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:06:17,773 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:06:17,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (134)] Waiting until timeout for monitored process [2022-11-23 14:06:18,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:06:18,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:06:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:06:18,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:18,233 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 [2022-11-23 14:06:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:21,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:29,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [817136384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:29,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646727485] [2022-11-23 14:06:29,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:06:29,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:29,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:29,283 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:29,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f709bc32-d541-4f8f-b505-a5d393f34608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-11-23 14:06:29,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:06:29,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:06:29,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:06:29,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:29,563 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 6 treesize of output 5 [2022-11-23 14:06:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:30,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:41,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646727485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:41,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:06:41,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 19, 16, 18, 16] total 63 [2022-11-23 14:06:41,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347716971] [2022-11-23 14:06:41,265 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:06:41,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-23 14:06:41,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:41,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-23 14:06:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3626, Unknown=2, NotChecked=0, Total=4032 [2022-11-23 14:06:41,267 INFO L87 Difference]: Start difference. First operand 315 states and 372 transitions. Second operand has 64 states, 62 states have (on average 2.8225806451612905) internal successors, (175), 59 states have internal predecessors, (175), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9)