./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur --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 c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --- 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-38b53e6 [2022-11-25 23:20:05,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:20:05,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:20:05,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:20:05,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:20:05,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:20:05,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:20:05,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:20:05,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:20:05,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:20:05,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:20:05,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:20:05,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:20:05,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:20:05,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:20:05,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:20:05,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:20:05,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:20:05,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:20:05,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:20:05,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:20:05,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:20:05,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:20:05,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:20:05,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:20:05,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:20:05,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:20:05,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:20:05,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:20:05,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:20:05,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:20:05,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:20:05,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:20:05,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:20:05,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:20:05,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:20:05,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:20:05,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:20:05,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:20:05,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:20:05,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:20:05,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:20:05,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:20:05,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:20:05,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:20:05,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:20:05,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:20:05,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:20:05,660 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:20:05,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:20:05,661 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:20:05,661 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:20:05,661 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:20:05,662 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:20:05,662 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:20:05,662 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:20:05,663 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:20:05,663 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:20:05,663 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:20:05,664 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:20:05,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:20:05,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:20:05,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:20:05,666 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:20:05,666 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:20:05,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:20:05,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:20:05,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:20:05,667 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:20:05,667 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:20:05,668 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:20:05,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:20:05,668 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:20:05,669 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:20:05,669 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:20:05,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:20:05,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:20:05,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:20:05,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:20:05,671 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:20:05,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:20:05,671 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:20:05,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:20:05,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:20:05,672 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_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 [2022-11-25 23:20:06,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:20:06,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:20:06,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:20:06,094 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:20:06,097 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:20:06,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-11-25 23:20:09,700 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:20:10,015 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:20:10,016 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-11-25 23:20:10,027 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/data/b89f0da96/6c9c0468c69d4242ac934723f06559ea/FLAGb1aa6e1bc [2022-11-25 23:20:10,046 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/data/b89f0da96/6c9c0468c69d4242ac934723f06559ea [2022-11-25 23:20:10,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:20:10,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:20:10,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:20:10,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:20:10,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:20:10,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:20:10" (1/1) ... [2022-11-25 23:20:10,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bec6ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:10, skipping insertion in model container [2022-11-25 23:20:10,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:20:10" (1/1) ... [2022-11-25 23:20:10,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:20:10,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:20:10,295 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,304 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,308 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,318 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,319 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,324 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:10,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:10,341 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-11-25 23:20:10,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:20:10,372 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) [2022-11-25 23:20:10,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@385e62ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:10, skipping insertion in model container [2022-11-25 23:20:10,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:20:10,373 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 23:20:10,376 INFO L158 Benchmark]: Toolchain (without parser) took 321.87ms. Allocated memory is still 169.9MB. Free memory was 126.4MB in the beginning and 115.0MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 23:20:10,376 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 169.9MB. Free memory is still 141.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:20:10,377 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.77ms. Allocated memory is still 169.9MB. Free memory was 126.4MB in the beginning and 115.0MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 23:20:10,379 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 169.9MB. Free memory is still 141.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 317.77ms. Allocated memory is still 169.9MB. Free memory was 126.4MB in the beginning and 115.0MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 175]: 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_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur --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 c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --- 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-38b53e6 [2022-11-25 23:20:13,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:20:13,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:20:13,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:20:13,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:20:13,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:20:13,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:20:13,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:20:13,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:20:13,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:20:13,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:20:13,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:20:13,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:20:13,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:20:13,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:20:13,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:20:13,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:20:13,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:20:13,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:20:13,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:20:13,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:20:13,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:20:13,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:20:13,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:20:13,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:20:13,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:20:13,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:20:13,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:20:13,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:20:13,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:20:13,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:20:13,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:20:13,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:20:13,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:20:13,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:20:13,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:20:13,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:20:13,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:20:13,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:20:13,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:20:13,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:20:13,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-25 23:20:13,126 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:20:13,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:20:13,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:20:13,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:20:13,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:20:13,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:20:13,129 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:20:13,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:20:13,130 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:20:13,130 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:20:13,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:20:13,131 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:20:13,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:20:13,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:20:13,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:20:13,133 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:20:13,133 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:20:13,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:20:13,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:20:13,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:20:13,134 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:20:13,135 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:20:13,135 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:20:13,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:20:13,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:20:13,136 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:20:13,136 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:20:13,137 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:20:13,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:20:13,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:20:13,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:20:13,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:20:13,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:20:13,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:20:13,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:20:13,139 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:20:13,139 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:20:13,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:20:13,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:20:13,141 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_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 [2022-11-25 23:20:13,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:20:13,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:20:13,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:20:13,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:20:13,656 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:20:13,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-11-25 23:20:17,232 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:20:17,466 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:20:17,467 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-11-25 23:20:17,475 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/data/59794677c/a3edb0b8148040518cd7274339d800ca/FLAG323e8a075 [2022-11-25 23:20:17,498 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/data/59794677c/a3edb0b8148040518cd7274339d800ca [2022-11-25 23:20:17,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:20:17,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:20:17,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:20:17,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:20:17,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:20:17,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:20:17" (1/1) ... [2022-11-25 23:20:17,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25320b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:17, skipping insertion in model container [2022-11-25 23:20:17,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:20:17" (1/1) ... [2022-11-25 23:20:17,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:20:17,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:20:17,764 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,770 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,770 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,771 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,775 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,777 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,777 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,778 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,804 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,805 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,806 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,828 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-11-25 23:20:17,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:20:17,862 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 23:20:17,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:20:17,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,877 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,878 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,878 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,884 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,884 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,885 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,890 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,893 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,894 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,896 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,904 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,915 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-11-25 23:20:17,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:20:17,940 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:20:17,959 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,960 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,960 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,961 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:20:17,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:20:17,985 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-11-25 23:20:17,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:20:18,012 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:20:18,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18 WrapperNode [2022-11-25 23:20:18,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:20:18,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:20:18,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:20:18,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:20:18,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,090 INFO L138 Inliner]: procedures = 31, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 367 [2022-11-25 23:20:18,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:20:18,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:20:18,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:20:18,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:20:18,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,141 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:20:18,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:20:18,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:20:18,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:20:18,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (1/1) ... [2022-11-25 23:20:18,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:20:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:20:18,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:20:18,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:20:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:20:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:20:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:20:18,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 23:20:18,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:20:18,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:20:18,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:20:18,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:20:18,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 23:20:18,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 23:20:18,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-25 23:20:18,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-25 23:20:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-25 23:20:18,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-25 23:20:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-11-25 23:20:18,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-11-25 23:20:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 23:20:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 23:20:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:20:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:20:18,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:20:18,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:20:18,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 23:20:18,288 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:20:18,514 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:20:18,517 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:20:19,831 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:20:20,229 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:20:20,230 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 23:20:20,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:20:20 BoogieIcfgContainer [2022-11-25 23:20:20,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:20:20,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:20:20,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:20:20,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:20:20,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:20:17" (1/3) ... [2022-11-25 23:20:20,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fb622b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:20:20, skipping insertion in model container [2022-11-25 23:20:20,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:20:18" (2/3) ... [2022-11-25 23:20:20,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fb622b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:20:20, skipping insertion in model container [2022-11-25 23:20:20,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:20:20" (3/3) ... [2022-11-25 23:20:20,251 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2022-11-25 23:20:20,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:20:20,273 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2022-11-25 23:20:20,273 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:20:20,507 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-11-25 23:20:20,575 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:20:20,608 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 340 transitions, 752 flow [2022-11-25 23:20:20,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 340 transitions, 752 flow [2022-11-25 23:20:20,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 340 transitions, 752 flow [2022-11-25 23:20:20,866 INFO L130 PetriNetUnfolder]: 21/290 cut-off events. [2022-11-25 23:20:20,866 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 23:20:20,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 290 events. 21/290 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 463 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-11-25 23:20:20,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 13600 [2022-11-25 23:21:16,055 INFO L134 LiptonReduction]: Checked pairs total: 58216 [2022-11-25 23:21:16,056 INFO L136 LiptonReduction]: Total number of compositions: 318 [2022-11-25 23:21:16,065 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 127 places, 117 transitions, 306 flow [2022-11-25 23:21:20,135 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 58810 states, 53598 states have (on average 5.914045300197769) internal successors, (316981), 58809 states have internal predecessors, (316981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:20,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:21:20,172 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;@1d339da6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:21:20,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2022-11-25 23:21:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 58810 states, 53598 states have (on average 5.914045300197769) internal successors, (316981), 58809 states have internal predecessors, (316981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:21:20,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:20,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:21:20,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:21:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:20,545 INFO L85 PathProgramCache]: Analyzing trace with hash 52891, now seen corresponding path program 1 times [2022-11-25 23:21:20,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:20,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097412491] [2022-11-25 23:21:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:20,565 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 [2022-11-25 23:21:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:20,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:21:20,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:20,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:21:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:20,989 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-25 23:21:20,990 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 23:21:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:21,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:21,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097412491] [2022-11-25 23:21:21,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097412491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:21,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:21,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:21:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133087195] [2022-11-25 23:21:21,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:21,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:21,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:21,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:21,268 INFO L87 Difference]: Start difference. First operand has 58810 states, 53598 states have (on average 5.914045300197769) internal successors, (316981), 58809 states have internal predecessors, (316981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:23,952 INFO L93 Difference]: Finished difference Result 45842 states and 239941 transitions. [2022-11-25 23:21:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:21:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:24,983 INFO L225 Difference]: With dead ends: 45842 [2022-11-25 23:21:24,993 INFO L226 Difference]: Without dead ends: 45842 [2022-11-25 23:21:24,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:25,017 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:25,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 36 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:21:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45842 states. [2022-11-25 23:21:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45842 to 44884. [2022-11-25 23:21:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44884 states, 41274 states have (on average 5.741507971119833) internal successors, (236975), 44883 states have internal predecessors, (236975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44884 states to 44884 states and 236975 transitions. [2022-11-25 23:21:28,630 INFO L78 Accepts]: Start accepts. Automaton has 44884 states and 236975 transitions. Word has length 2 [2022-11-25 23:21:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:28,631 INFO L495 AbstractCegarLoop]: Abstraction has 44884 states and 236975 transitions. [2022-11-25 23:21:28,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 44884 states and 236975 transitions. [2022-11-25 23:21:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:21:28,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:28,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:21:28,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:28,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:21:28,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:21:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash 52892, now seen corresponding path program 1 times [2022-11-25 23:21:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:28,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008063841] [2022-11-25 23:21:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:28,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:21:28,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:28,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:21:28,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:29,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:21:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:29,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:29,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:29,105 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:21:29,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 23:21:29,123 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 10 treesize of output 8 [2022-11-25 23:21:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:29,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:29,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:29,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008063841] [2022-11-25 23:21:29,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008063841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:29,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:29,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:21:29,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720500746] [2022-11-25 23:21:29,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:29,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:29,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:29,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:29,174 INFO L87 Difference]: Start difference. First operand 44884 states and 236975 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:30,882 INFO L93 Difference]: Finished difference Result 30483 states and 155134 transitions. [2022-11-25 23:21:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:21:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:31,277 INFO L225 Difference]: With dead ends: 30483 [2022-11-25 23:21:31,277 INFO L226 Difference]: Without dead ends: 30483 [2022-11-25 23:21:31,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:31,282 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:31,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 18 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:21:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2022-11-25 23:21:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 30483. [2022-11-25 23:21:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30483 states, 28555 states have (on average 5.432813867974085) internal successors, (155134), 30482 states have internal predecessors, (155134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30483 states to 30483 states and 155134 transitions. [2022-11-25 23:21:32,800 INFO L78 Accepts]: Start accepts. Automaton has 30483 states and 155134 transitions. Word has length 2 [2022-11-25 23:21:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:32,800 INFO L495 AbstractCegarLoop]: Abstraction has 30483 states and 155134 transitions. [2022-11-25 23:21:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 30483 states and 155134 transitions. [2022-11-25 23:21:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:21:32,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:32,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:21:32,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:33,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:21:33,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:21:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 52661, now seen corresponding path program 1 times [2022-11-25 23:21:33,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:33,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879150181] [2022-11-25 23:21:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:33,006 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 [2022-11-25 23:21:33,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:33,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:21:33,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:33,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:21:33,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:33,178 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 23:21:33,179 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 23:21:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:33,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:33,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879150181] [2022-11-25 23:21:33,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879150181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:33,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:33,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:21:33,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277155055] [2022-11-25 23:21:33,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:33,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:33,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:33,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:33,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:33,199 INFO L87 Difference]: Start difference. First operand 30483 states and 155134 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:34,852 INFO L93 Difference]: Finished difference Result 30482 states and 155133 transitions. [2022-11-25 23:21:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:34,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:21:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:35,105 INFO L225 Difference]: With dead ends: 30482 [2022-11-25 23:21:35,105 INFO L226 Difference]: Without dead ends: 30482 [2022-11-25 23:21:35,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:35,116 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:35,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 36 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:21:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30482 states. [2022-11-25 23:21:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30482 to 30482. [2022-11-25 23:21:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30482 states, 28555 states have (on average 5.432778847837507) internal successors, (155133), 30481 states have internal predecessors, (155133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30482 states to 30482 states and 155133 transitions. [2022-11-25 23:21:36,889 INFO L78 Accepts]: Start accepts. Automaton has 30482 states and 155133 transitions. Word has length 2 [2022-11-25 23:21:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:36,889 INFO L495 AbstractCegarLoop]: Abstraction has 30482 states and 155133 transitions. [2022-11-25 23:21:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 30482 states and 155133 transitions. [2022-11-25 23:21:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:21:36,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:36,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:21:36,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:37,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:21:37,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:21:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash 52662, now seen corresponding path program 1 times [2022-11-25 23:21:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:37,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195337696] [2022-11-25 23:21:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:37,093 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 [2022-11-25 23:21:37,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:37,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:21:37,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:21:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:37,318 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:21:37,318 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:21:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:37,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:37,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195337696] [2022-11-25 23:21:37,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195337696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:37,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:37,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:21:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515625239] [2022-11-25 23:21:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:37,364 INFO L87 Difference]: Start difference. First operand 30482 states and 155133 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:38,212 INFO L93 Difference]: Finished difference Result 30492 states and 155153 transitions. [2022-11-25 23:21:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:21:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:39,129 INFO L225 Difference]: With dead ends: 30492 [2022-11-25 23:21:39,129 INFO L226 Difference]: Without dead ends: 30492 [2022-11-25 23:21:39,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:39,139 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:39,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:21:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30492 states. [2022-11-25 23:21:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30492 to 30483. [2022-11-25 23:21:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30483 states, 28556 states have (on average 5.432658635663258) internal successors, (155135), 30482 states have internal predecessors, (155135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30483 states to 30483 states and 155135 transitions. [2022-11-25 23:21:40,795 INFO L78 Accepts]: Start accepts. Automaton has 30483 states and 155135 transitions. Word has length 2 [2022-11-25 23:21:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:40,796 INFO L495 AbstractCegarLoop]: Abstraction has 30483 states and 155135 transitions. [2022-11-25 23:21:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 30483 states and 155135 transitions. [2022-11-25 23:21:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:21:40,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:40,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:21:40,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:40,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:21:40,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:21:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1640017, now seen corresponding path program 1 times [2022-11-25 23:21:41,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:41,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538589224] [2022-11-25 23:21:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:41,001 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 [2022-11-25 23:21:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:41,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:21:41,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:21:41,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:41,249 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:21:41,249 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:21:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:41,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:41,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538589224] [2022-11-25 23:21:41,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538589224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [994581730] [2022-11-25 23:21:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:41,635 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:21:41,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:21:41,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:21:41,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-25 23:21:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:41,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:21:41,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:41,946 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:21:41,946 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:21:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:41,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:42,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [994581730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212360007] [2022-11-25 23:21:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:42,106 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:42,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:21:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:42,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:21:42,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:42,322 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:21:42,322 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:21:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:42,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:42,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212360007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:42,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:21:42,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-25 23:21:42,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128949696] [2022-11-25 23:21:42,600 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:21:42,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:21:42,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:42,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:21:42,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:21:42,601 INFO L87 Difference]: Start difference. First operand 30483 states and 155135 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:45,115 INFO L93 Difference]: Finished difference Result 30523 states and 155217 transitions. [2022-11-25 23:21:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:21:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-25 23:21:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:45,314 INFO L225 Difference]: With dead ends: 30523 [2022-11-25 23:21:45,314 INFO L226 Difference]: Without dead ends: 30523 [2022-11-25 23:21:45,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:21:45,315 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 82 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:45,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 92 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-25 23:21:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30523 states. [2022-11-25 23:21:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30523 to 30486. [2022-11-25 23:21:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30486 states, 28559 states have (on average 5.432298049651599) internal successors, (155141), 30485 states have internal predecessors, (155141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30486 states to 30486 states and 155141 transitions. [2022-11-25 23:21:47,338 INFO L78 Accepts]: Start accepts. Automaton has 30486 states and 155141 transitions. Word has length 3 [2022-11-25 23:21:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:47,338 INFO L495 AbstractCegarLoop]: Abstraction has 30486 states and 155141 transitions. [2022-11-25 23:21:47,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 30486 states and 155141 transitions. [2022-11-25 23:21:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:21:47,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:47,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:21:47,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:47,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:47,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 23:21:47,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:47,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:21:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1639843494, now seen corresponding path program 1 times [2022-11-25 23:21:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:47,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388502081] [2022-11-25 23:21:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:47,944 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 [2022-11-25 23:21:47,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:47,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:21:47,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-25 23:21:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:21:48,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:48,152 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2022-11-25 23:21:48,153 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 2 case distinctions, treesize of input 12 treesize of output 29 [2022-11-25 23:21:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:48,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:48,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:48,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388502081] [2022-11-25 23:21:48,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388502081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:48,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:48,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:21:48,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303836623] [2022-11-25 23:21:48,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:48,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:48,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:48,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:48,190 INFO L87 Difference]: Start difference. First operand 30486 states and 155141 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:49,700 INFO L93 Difference]: Finished difference Result 31318 states and 158169 transitions. [2022-11-25 23:21:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:49,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:21:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:49,880 INFO L225 Difference]: With dead ends: 31318 [2022-11-25 23:21:49,880 INFO L226 Difference]: Without dead ends: 31318 [2022-11-25 23:21:49,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:49,881 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:49,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 35 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:21:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31318 states. [2022-11-25 23:21:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31318 to 30723. [2022-11-25 23:21:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30723 states, 28836 states have (on average 5.415938410320432) internal successors, (156174), 30722 states have internal predecessors, (156174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30723 states to 30723 states and 156174 transitions. [2022-11-25 23:21:51,427 INFO L78 Accepts]: Start accepts. Automaton has 30723 states and 156174 transitions. Word has length 6 [2022-11-25 23:21:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:51,427 INFO L495 AbstractCegarLoop]: Abstraction has 30723 states and 156174 transitions. [2022-11-25 23:21:51,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:51,427 INFO L276 IsEmpty]: Start isEmpty. Operand 30723 states and 156174 transitions. [2022-11-25 23:21:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:21:51,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:51,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:21:51,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:51,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:21:51,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:21:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1639843495, now seen corresponding path program 1 times [2022-11-25 23:21:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:51,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528338609] [2022-11-25 23:21:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:51,645 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 [2022-11-25 23:21:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:51,646 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:21:51,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 23:21:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:21:51,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:51,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:51,805 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:21:51,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 23:21:51,813 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 14 treesize of output 12 [2022-11-25 23:21:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:51,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:51,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:51,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528338609] [2022-11-25 23:21:51,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528338609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:51,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:51,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:21:51,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366519581] [2022-11-25 23:21:51,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:51,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:51,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:51,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:51,860 INFO L87 Difference]: Start difference. First operand 30723 states and 156174 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:52,466 INFO L93 Difference]: Finished difference Result 30483 states and 155254 transitions. [2022-11-25 23:21:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:52,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:21:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:52,657 INFO L225 Difference]: With dead ends: 30483 [2022-11-25 23:21:52,657 INFO L226 Difference]: Without dead ends: 30483 [2022-11-25 23:21:52,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:52,663 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:52,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 17 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:21:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2022-11-25 23:21:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 30483. [2022-11-25 23:21:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30483 states, 28678 states have (on average 5.413696910523746) internal successors, (155254), 30482 states have internal predecessors, (155254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30483 states to 30483 states and 155254 transitions. [2022-11-25 23:21:54,267 INFO L78 Accepts]: Start accepts. Automaton has 30483 states and 155254 transitions. Word has length 6 [2022-11-25 23:21:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:54,267 INFO L495 AbstractCegarLoop]: Abstraction has 30483 states and 155254 transitions. [2022-11-25 23:21:54,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 30483 states and 155254 transitions. [2022-11-25 23:21:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:21:54,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:54,268 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-25 23:21:54,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:54,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:21:54,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:21:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:54,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1620548726, now seen corresponding path program 2 times [2022-11-25 23:21:54,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:54,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670144951] [2022-11-25 23:21:54,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:21:54,470 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 [2022-11-25 23:21:54,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:54,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:21:54,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:21:54,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:21:54,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:21:54,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:21:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:54,707 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:21:54,707 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:21:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:54,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:55,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670144951] [2022-11-25 23:21:55,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670144951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:55,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545942008] [2022-11-25 23:21:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:21:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:21:55,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:21:55,896 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:21:55,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-25 23:21:56,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:21:56,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:21:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:21:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:56,259 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:21:56,260 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:21:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:56,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:57,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [545942008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:57,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197794870] [2022-11-25 23:21:57,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:21:57,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:57,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:57,242 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:57,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:21:57,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:21:57,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:21:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:21:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:57,492 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 23:21:57,492 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 23:21:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:57,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:57,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197794870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:57,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:21:57,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-25 23:21:57,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754788726] [2022-11-25 23:21:57,867 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:21:57,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:21:57,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:21:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:21:57,869 INFO L87 Difference]: Start difference. First operand 30483 states and 155254 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:07,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:07,160 INFO L93 Difference]: Finished difference Result 30568 states and 155428 transitions. [2022-11-25 23:22:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:22:07,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:22:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:07,399 INFO L225 Difference]: With dead ends: 30568 [2022-11-25 23:22:07,399 INFO L226 Difference]: Without dead ends: 30568 [2022-11-25 23:22:07,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:22:07,400 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 207 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:07,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 148 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-25 23:22:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30568 states. [2022-11-25 23:22:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30568 to 30489. [2022-11-25 23:22:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30489 states, 28684 states have (on average 5.412982847580532) internal successors, (155266), 30488 states have internal predecessors, (155266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30489 states to 30489 states and 155266 transitions. [2022-11-25 23:22:09,081 INFO L78 Accepts]: Start accepts. Automaton has 30489 states and 155266 transitions. Word has length 6 [2022-11-25 23:22:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:09,082 INFO L495 AbstractCegarLoop]: Abstraction has 30489 states and 155266 transitions. [2022-11-25 23:22:09,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30489 states and 155266 transitions. [2022-11-25 23:22:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:22:09,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:09,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:09,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:09,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:09,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:22:09,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:22:09,684 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:22:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:09,684 INFO L85 PathProgramCache]: Analyzing trace with hash -694397132, now seen corresponding path program 1 times [2022-11-25 23:22:09,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:22:09,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899440143] [2022-11-25 23:22:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:09,685 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 [2022-11-25 23:22:09,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:22:09,686 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:22:09,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 23:22:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:22:09,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:09,801 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 [2022-11-25 23:22:09,821 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:22:09,822 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 [2022-11-25 23:22:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:09,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:22:09,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:22:09,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899440143] [2022-11-25 23:22:09,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899440143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:22:09,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:22:09,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:22:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124321919] [2022-11-25 23:22:09,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:22:09,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:22:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:22:09,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:22:09,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:22:09,837 INFO L87 Difference]: Start difference. First operand 30489 states and 155266 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:10,651 INFO L93 Difference]: Finished difference Result 27009 states and 133992 transitions. [2022-11-25 23:22:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:22:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:22:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:10,803 INFO L225 Difference]: With dead ends: 27009 [2022-11-25 23:22:10,803 INFO L226 Difference]: Without dead ends: 27009 [2022-11-25 23:22:10,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:22:10,804 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 66 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:10,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 53 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:22:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27009 states. [2022-11-25 23:22:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27009 to 26631. [2022-11-25 23:22:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26631 states, 25226 states have (on average 5.265638626813605) internal successors, (132831), 26630 states have internal predecessors, (132831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26631 states to 26631 states and 132831 transitions. [2022-11-25 23:22:12,248 INFO L78 Accepts]: Start accepts. Automaton has 26631 states and 132831 transitions. Word has length 8 [2022-11-25 23:22:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:12,248 INFO L495 AbstractCegarLoop]: Abstraction has 26631 states and 132831 transitions. [2022-11-25 23:22:12,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 26631 states and 132831 transitions. [2022-11-25 23:22:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:22:12,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:12,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:12,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:12,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:22:12,450 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:22:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash -694397131, now seen corresponding path program 1 times [2022-11-25 23:22:12,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:22:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812432864] [2022-11-25 23:22:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:12,451 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 [2022-11-25 23:22:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:22:12,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:22:12,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 23:22:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:22:12,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:12,632 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 [2022-11-25 23:22:12,672 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:22:12,672 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 12 treesize of output 14 [2022-11-25 23:22:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:12,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:22:12,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:22:12,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812432864] [2022-11-25 23:22:12,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812432864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:22:12,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:22:12,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:22:12,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734428392] [2022-11-25 23:22:12,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:22:12,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:22:12,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:22:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:22:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:22:12,711 INFO L87 Difference]: Start difference. First operand 26631 states and 132831 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:13,432 INFO L93 Difference]: Finished difference Result 22449 states and 108962 transitions. [2022-11-25 23:22:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:22:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:22:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:14,275 INFO L225 Difference]: With dead ends: 22449 [2022-11-25 23:22:14,276 INFO L226 Difference]: Without dead ends: 22449 [2022-11-25 23:22:14,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:22:14,277 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 68 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:14,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 46 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:22:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22449 states. [2022-11-25 23:22:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22449 to 22449. [2022-11-25 23:22:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22449 states, 21464 states have (on average 5.076500186358554) internal successors, (108962), 22448 states have internal predecessors, (108962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22449 states to 22449 states and 108962 transitions. [2022-11-25 23:22:14,973 INFO L78 Accepts]: Start accepts. Automaton has 22449 states and 108962 transitions. Word has length 8 [2022-11-25 23:22:14,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:14,974 INFO L495 AbstractCegarLoop]: Abstraction has 22449 states and 108962 transitions. [2022-11-25 23:22:14,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 22449 states and 108962 transitions. [2022-11-25 23:22:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:22:14,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:14,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:14,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:15,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:22:15,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:22:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1595672752, now seen corresponding path program 1 times [2022-11-25 23:22:15,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:22:15,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400642848] [2022-11-25 23:22:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:15,179 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 [2022-11-25 23:22:15,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:22:15,180 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:22:15,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:22:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:15,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:22:15,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:15,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:22:15,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:22:15,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400642848] [2022-11-25 23:22:15,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400642848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:22:15,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:22:15,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:22:15,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891530536] [2022-11-25 23:22:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:22:15,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:22:15,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:22:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:22:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:22:15,451 INFO L87 Difference]: Start difference. First operand 22449 states and 108962 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:17,101 INFO L93 Difference]: Finished difference Result 31930 states and 149303 transitions. [2022-11-25 23:22:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:22:17,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:22:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:17,344 INFO L225 Difference]: With dead ends: 31930 [2022-11-25 23:22:17,345 INFO L226 Difference]: Without dead ends: 31910 [2022-11-25 23:22:17,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:22:17,346 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 132 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:17,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 102 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:22:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31910 states. [2022-11-25 23:22:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31910 to 30914. [2022-11-25 23:22:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30914 states, 29888 states have (on average 4.900127141327623) internal successors, (146455), 30913 states have internal predecessors, (146455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30914 states to 30914 states and 146455 transitions. [2022-11-25 23:22:18,600 INFO L78 Accepts]: Start accepts. Automaton has 30914 states and 146455 transitions. Word has length 10 [2022-11-25 23:22:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:18,600 INFO L495 AbstractCegarLoop]: Abstraction has 30914 states and 146455 transitions. [2022-11-25 23:22:18,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 30914 states and 146455 transitions. [2022-11-25 23:22:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:22:18,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:18,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:18,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:22:18,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:22:18,803 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:22:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash -961321749, now seen corresponding path program 1 times [2022-11-25 23:22:18,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:22:18,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003677537] [2022-11-25 23:22:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:18,805 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 [2022-11-25 23:22:18,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:22:18,806 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:22:18,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 23:22:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:22:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:19,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:19,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:22:19,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003677537] [2022-11-25 23:22:19,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003677537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:19,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905648015] [2022-11-25 23:22:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:19,793 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:22:19,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:22:19,795 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:22:19,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-25 23:22:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:22:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:20,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:20,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [905648015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:20,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345887843] [2022-11-25 23:22:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:20,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:20,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:22:20,454 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:22:20,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:22:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:22:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:20,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:20,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345887843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:20,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:22:20,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-25 23:22:20,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238883904] [2022-11-25 23:22:20,877 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:22:20,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:22:20,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:22:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:22:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:22:20,879 INFO L87 Difference]: Start difference. First operand 30914 states and 146455 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:23,906 INFO L93 Difference]: Finished difference Result 61598 states and 276166 transitions. [2022-11-25 23:22:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:22:23,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:22:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:24,350 INFO L225 Difference]: With dead ends: 61598 [2022-11-25 23:22:24,350 INFO L226 Difference]: Without dead ends: 61598 [2022-11-25 23:22:24,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:22:24,351 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1362 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:24,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 367 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 23:22:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61598 states. [2022-11-25 23:22:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61598 to 36669. [2022-11-25 23:22:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36669 states, 35643 states have (on average 4.851976545184187) internal successors, (172939), 36668 states have internal predecessors, (172939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36669 states to 36669 states and 172939 transitions. [2022-11-25 23:22:26,948 INFO L78 Accepts]: Start accepts. Automaton has 36669 states and 172939 transitions. Word has length 11 [2022-11-25 23:22:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:26,949 INFO L495 AbstractCegarLoop]: Abstraction has 36669 states and 172939 transitions. [2022-11-25 23:22:26,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 36669 states and 172939 transitions. [2022-11-25 23:22:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:22:26,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:26,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:26,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:27,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:27,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:27,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:22:27,559 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-25 23:22:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:27,560 INFO L85 PathProgramCache]: Analyzing trace with hash -138126321, now seen corresponding path program 1 times [2022-11-25 23:22:27,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:22:27,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796881985] [2022-11-25 23:22:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:27,560 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 [2022-11-25 23:22:27,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:22:27,562 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:22:27,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98401429-1833-4916-a324-a04733bfac21/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 23:22:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:22:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:27,706 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 [2022-11-25 23:22:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:22:27,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:22:27,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:22:27,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796881985] [2022-11-25 23:22:27,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796881985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:22:27,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:22:27,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:22:27,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615030412] [2022-11-25 23:22:27,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:22:27,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:22:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:22:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:22:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:22:27,760 INFO L87 Difference]: Start difference. First operand 36669 states and 172939 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:28,585 INFO L93 Difference]: Finished difference Result 34209 states and 159851 transitions. [2022-11-25 23:22:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:22:28,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:22:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:28,778 INFO L225 Difference]: With dead ends: 34209 [2022-11-25 23:22:28,778 INFO L226 Difference]: Without dead ends: 34209 [2022-11-25 23:22:28,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:22:28,779 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 64 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:28,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:22:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34209 states. [2022-11-25 23:22:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34209 to 34209. [2022-11-25 23:22:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34209 states, 33435 states have (on average 4.780948108269778) internal successors, (159851), 34208 states have internal predecessors, (159851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)