./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:19:45,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:19:45,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:19:45,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:19:45,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:19:45,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:19:45,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:19:45,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:19:45,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:19:45,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:19:45,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:19:45,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:19:45,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:19:45,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:19:45,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:19:45,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:19:45,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:19:45,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:19:45,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:19:45,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:19:45,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:19:45,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:19:45,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:19:45,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:19:45,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:19:45,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:19:45,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:19:45,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:19:45,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:19:45,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:19:45,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:19:45,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:19:45,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:19:45,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:19:45,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:19:45,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:19:45,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:19:45,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:19:45,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:19:45,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:19:45,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:19:45,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 05:19:45,180 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:19:45,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:19:45,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:19:45,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:19:45,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:19:45,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:19:45,187 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:19:45,187 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:19:45,187 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:19:45,187 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:19:45,187 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:19:45,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:19:45,187 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:19:45,188 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:19:45,188 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:19:45,188 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:19:45,188 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:19:45,188 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:19:45,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:19:45,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:19:45,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:19:45,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:19:45,190 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:19:45,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:19:45,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:19:45,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:19:45,190 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:19:45,191 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:19:45,191 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:19:45,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:19:45,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:19:45,191 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:19:45,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:19:45,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:19:45,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:19:45,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:19:45,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:19:45,192 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:19:45,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:19:45,192 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:19:45,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:19:45,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:19:45,192 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_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c [2022-12-14 05:19:45,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:19:45,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:19:45,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:19:45,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:19:45,406 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:19:45,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-12-14 05:19:48,024 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:19:48,165 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:19:48,166 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-12-14 05:19:48,173 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/data/8f8870876/f2b9eadb196b4085b0c167f3067551d7/FLAGe3dedef8b [2022-12-14 05:19:48,183 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/data/8f8870876/f2b9eadb196b4085b0c167f3067551d7 [2022-12-14 05:19:48,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:19:48,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:19:48,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:19:48,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:19:48,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:19:48,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:19:48" (1/1) ... [2022-12-14 05:19:48,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6925e22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:48, skipping insertion in model container [2022-12-14 05:19:48,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:19:48" (1/1) ... [2022-12-14 05:19:48,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:19:48,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:19:48,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,344 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,344 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,348 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,348 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:48,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:48,371 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_8a8ed57d-ac32-49ac-9de1-05626b115f71/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-12-14 05:19:48,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:19:48,390 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 05:19:48,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3505524f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:48, skipping insertion in model container [2022-12-14 05:19:48,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:19:48,390 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 05:19:48,392 INFO L158 Benchmark]: Toolchain (without parser) took 205.60ms. Allocated memory is still 155.2MB. Free memory was 111.5MB in the beginning and 98.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 05:19:48,393 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 155.2MB. Free memory is still 123.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:19:48,393 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.99ms. Allocated memory is still 155.2MB. Free memory was 111.5MB in the beginning and 98.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 05:19:48,395 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 155.2MB. Free memory is still 123.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 203.99ms. Allocated memory is still 155.2MB. Free memory was 111.5MB in the beginning and 98.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 170]: 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_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:19:49,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:19:49,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:19:49,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:19:49,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:19:49,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:19:49,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:19:49,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:19:49,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:19:49,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:19:49,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:19:49,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:19:49,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:19:49,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:19:49,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:19:49,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:19:49,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:19:49,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:19:49,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:19:49,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:19:49,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:19:49,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:19:49,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:19:49,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:19:49,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:19:49,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:19:49,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:19:49,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:19:49,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:19:49,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:19:49,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:19:49,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:19:49,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:19:49,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:19:49,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:19:49,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:19:49,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:19:49,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:19:49,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:19:49,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:19:49,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:19:49,932 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 05:19:49,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:19:49,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:19:49,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:19:49,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:19:49,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:19:49,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:19:49,958 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:19:49,958 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:19:49,958 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:19:49,959 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:19:49,959 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:19:49,959 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:19:49,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:19:49,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:19:49,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:19:49,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:19:49,961 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:19:49,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:19:49,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:19:49,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:19:49,961 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:19:49,962 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:19:49,962 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:19:49,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:19:49,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:19:49,962 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 05:19:49,963 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 05:19:49,963 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:19:49,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:19:49,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:19:49,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 05:19:49,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:19:49,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:19:49,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:19:49,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:19:49,968 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 05:19:49,968 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 05:19:49,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:19:49,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 05:19:49,969 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_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c [2022-12-14 05:19:50,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:19:50,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:19:50,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:19:50,214 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:19:50,214 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:19:50,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-12-14 05:19:52,899 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:19:53,051 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:19:53,051 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-12-14 05:19:53,058 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/data/ec856e45d/5aa19077808643c38e0b9671fac1a021/FLAG426622ebb [2022-12-14 05:19:53,070 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/data/ec856e45d/5aa19077808643c38e0b9671fac1a021 [2022-12-14 05:19:53,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:19:53,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:19:53,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:19:53,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:19:53,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:19:53,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276b414a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53, skipping insertion in model container [2022-12-14 05:19:53,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:19:53,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:19:53,259 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,261 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,261 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,261 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,263 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,263 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,263 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,264 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,264 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,265 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,265 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,268 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,268 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,269 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,271 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,271 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,272 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,272 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,272 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,273 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,273 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,273 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,274 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,274 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,275 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,275 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,281 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,282 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,285 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,285 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,286 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,287 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,287 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,287 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,288 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,288 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,295 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_8a8ed57d-ac32-49ac-9de1-05626b115f71/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-12-14 05:19:53,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:19:53,314 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 05:19:53,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:19:53,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,324 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,324 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,324 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,336 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_8a8ed57d-ac32-49ac-9de1-05626b115f71/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-12-14 05:19:53,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:19:53,342 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:19:53,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,362 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:19:53,362 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:19:53,365 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_8a8ed57d-ac32-49ac-9de1-05626b115f71/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-12-14 05:19:53,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:19:53,379 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:19:53,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53 WrapperNode [2022-12-14 05:19:53,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:19:53,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:19:53,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:19:53,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:19:53,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,412 INFO L138 Inliner]: procedures = 27, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 227 [2022-12-14 05:19:53,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:19:53,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:19:53,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:19:53,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:19:53,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,440 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:19:53,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:19:53,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:19:53,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:19:53,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (1/1) ... [2022-12-14 05:19:53,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:19:53,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:19:53,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:19:53,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:19:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:19:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 05:19:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:19:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 05:19:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 05:19:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 05:19:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 05:19:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 05:19:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 05:19:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 05:19:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 05:19:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 05:19:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 05:19:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:19:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:19:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:19:53,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 05:19:53,511 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 05:19:53,607 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:19:53,609 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:19:54,046 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:19:54,103 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:19:54,103 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 05:19:54,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:19:54 BoogieIcfgContainer [2022-12-14 05:19:54,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:19:54,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:19:54,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:19:54,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:19:54,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:19:53" (1/3) ... [2022-12-14 05:19:54,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676e965e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:19:54, skipping insertion in model container [2022-12-14 05:19:54,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:19:53" (2/3) ... [2022-12-14 05:19:54,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676e965e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:19:54, skipping insertion in model container [2022-12-14 05:19:54,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:19:54" (3/3) ... [2022-12-14 05:19:54,110 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2022-12-14 05:19:54,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:19:54,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-12-14 05:19:54,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 05:19:54,199 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 05:19:54,233 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 05:19:54,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 204 transitions, 432 flow [2022-12-14 05:19:54,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 204 transitions, 432 flow [2022-12-14 05:19:54,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 204 transitions, 432 flow [2022-12-14 05:19:54,324 INFO L130 PetriNetUnfolder]: 7/201 cut-off events. [2022-12-14 05:19:54,325 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 05:19:54,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 7/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 155. Up to 2 conditions per place. [2022-12-14 05:19:54,331 INFO L119 LiptonReduction]: Number of co-enabled transitions 2258 [2022-12-14 05:20:13,433 INFO L134 LiptonReduction]: Checked pairs total: 12181 [2022-12-14 05:20:13,433 INFO L136 LiptonReduction]: Total number of compositions: 200 [2022-12-14 05:20:13,441 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 59 transitions, 142 flow [2022-12-14 05:20:13,586 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3730 states, 3526 states have (on average 3.4330686330119113) internal successors, (12105), 3729 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:13,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:20:13,610 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;@1047d734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:20:13,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2022-12-14 05:20:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 3730 states, 3526 states have (on average 3.4330686330119113) internal successors, (12105), 3729 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:20:13,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:13,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:20:13,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash 27231, now seen corresponding path program 1 times [2022-12-14 05:20:13,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:13,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279637492] [2022-12-14 05:20:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:13,645 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 [2022-12-14 05:20:13,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:13,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:13,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 05:20:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:13,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:20:13,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:13,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:13,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279637492] [2022-12-14 05:20:13,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279637492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:13,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:13,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:20:13,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810837890] [2022-12-14 05:20:13,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:13,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:13,856 INFO L87 Difference]: Start difference. First operand has 3730 states, 3526 states have (on average 3.4330686330119113) internal successors, (12105), 3729 states have internal predecessors, (12105), 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) [2022-12-14 05:20:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:14,136 INFO L93 Difference]: Finished difference Result 3200 states and 10244 transitions. [2022-12-14 05:20:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:14,138 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 [2022-12-14 05:20:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:14,171 INFO L225 Difference]: With dead ends: 3200 [2022-12-14 05:20:14,171 INFO L226 Difference]: Without dead ends: 3200 [2022-12-14 05:20:14,171 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 [2022-12-14 05:20:14,174 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:14,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:20:14,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2022-12-14 05:20:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3198. [2022-12-14 05:20:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3030 states have (on average 3.380858085808581) internal successors, (10244), 3197 states have internal predecessors, (10244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 10244 transitions. [2022-12-14 05:20:14,343 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 10244 transitions. Word has length 2 [2022-12-14 05:20:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:14,343 INFO L495 AbstractCegarLoop]: Abstraction has 3198 states and 10244 transitions. [2022-12-14 05:20:14,344 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) [2022-12-14 05:20:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 10244 transitions. [2022-12-14 05:20:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:20:14,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:14,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:20:14,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:20:14,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:14,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash 27108, now seen corresponding path program 1 times [2022-12-14 05:20:14,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:14,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017904989] [2022-12-14 05:20:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:14,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:14,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:14,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:14,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 05:20:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:20:14,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:14,837 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 05:20:14,838 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 05:20:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:14,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:14,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:14,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017904989] [2022-12-14 05:20:14,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017904989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:14,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:14,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:20:14,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058488808] [2022-12-14 05:20:14,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:14,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:14,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:14,861 INFO L87 Difference]: Start difference. First operand 3198 states and 10244 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) [2022-12-14 05:20:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:15,046 INFO L93 Difference]: Finished difference Result 3197 states and 10242 transitions. [2022-12-14 05:20:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:15,046 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 [2022-12-14 05:20:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:15,067 INFO L225 Difference]: With dead ends: 3197 [2022-12-14 05:20:15,067 INFO L226 Difference]: Without dead ends: 3197 [2022-12-14 05:20:15,068 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 [2022-12-14 05:20:15,069 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:15,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 3 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:20:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2022-12-14 05:20:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3197. [2022-12-14 05:20:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3030 states have (on average 3.38019801980198) internal successors, (10242), 3196 states have internal predecessors, (10242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10242 transitions. [2022-12-14 05:20:15,184 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10242 transitions. Word has length 2 [2022-12-14 05:20:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:15,184 INFO L495 AbstractCegarLoop]: Abstraction has 3197 states and 10242 transitions. [2022-12-14 05:20:15,185 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) [2022-12-14 05:20:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10242 transitions. [2022-12-14 05:20:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:20:15,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:15,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:20:15,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 05:20:15,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:15,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash 27109, now seen corresponding path program 1 times [2022-12-14 05:20:15,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:15,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830850523] [2022-12-14 05:20:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:15,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:15,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:15,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 05:20:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:15,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:20:15,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:15,517 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:15,517 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:15,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:15,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:15,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830850523] [2022-12-14 05:20:15,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830850523] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:15,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:15,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:20:15,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79362338] [2022-12-14 05:20:15,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:15,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:15,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:15,552 INFO L87 Difference]: Start difference. First operand 3197 states and 10242 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) [2022-12-14 05:20:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:15,783 INFO L93 Difference]: Finished difference Result 3197 states and 10241 transitions. [2022-12-14 05:20:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:15,784 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 [2022-12-14 05:20:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:15,797 INFO L225 Difference]: With dead ends: 3197 [2022-12-14 05:20:15,797 INFO L226 Difference]: Without dead ends: 3197 [2022-12-14 05:20:15,797 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 [2022-12-14 05:20:15,798 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:15,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:20:15,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2022-12-14 05:20:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3197. [2022-12-14 05:20:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3030 states have (on average 3.37986798679868) internal successors, (10241), 3196 states have internal predecessors, (10241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10241 transitions. [2022-12-14 05:20:15,911 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10241 transitions. Word has length 2 [2022-12-14 05:20:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:15,911 INFO L495 AbstractCegarLoop]: Abstraction has 3197 states and 10241 transitions. [2022-12-14 05:20:15,911 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) [2022-12-14 05:20:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10241 transitions. [2022-12-14 05:20:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:20:15,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:15,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:20:15,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 05:20:16,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:16,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash 843771, now seen corresponding path program 1 times [2022-12-14 05:20:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:16,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096198978] [2022-12-14 05:20:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:16,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:16,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:16,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:16,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 05:20:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:16,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:20:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:16,312 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 05:20:16,313 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-14 05:20:16,338 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 05:20:16,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-12-14 05:20:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:16,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:16,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096198978] [2022-12-14 05:20:16,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096198978] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1084714231] [2022-12-14 05:20:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:16,795 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:16,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:16,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:16,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 05:20:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:20:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:17,003 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 05:20:17,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 05:20:17,027 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 05:20:17,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 05:20:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:20:17,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:17,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1084714231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:17,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:20:17,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-12-14 05:20:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847181306] [2022-12-14 05:20:17,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:17,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:17,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:17,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:17,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:20:17,079 INFO L87 Difference]: Start difference. First operand 3197 states and 10241 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:17,263 INFO L93 Difference]: Finished difference Result 2591 states and 8051 transitions. [2022-12-14 05:20:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:17,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 [2022-12-14 05:20:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:17,272 INFO L225 Difference]: With dead ends: 2591 [2022-12-14 05:20:17,272 INFO L226 Difference]: Without dead ends: 2591 [2022-12-14 05:20:17,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:20:17,274 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:17,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:20:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-12-14 05:20:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2591. [2022-12-14 05:20:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2461 states have (on average 3.271434376269809) internal successors, (8051), 2590 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 8051 transitions. [2022-12-14 05:20:17,327 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 8051 transitions. Word has length 3 [2022-12-14 05:20:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:17,328 INFO L495 AbstractCegarLoop]: Abstraction has 2591 states and 8051 transitions. [2022-12-14 05:20:17,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 8051 transitions. [2022-12-14 05:20:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:20:17,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:17,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:20:17,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 05:20:17,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 05:20:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:17,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash 843772, now seen corresponding path program 1 times [2022-12-14 05:20:17,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:17,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489115297] [2022-12-14 05:20:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:17,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:17,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:17,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:17,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 05:20:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:17,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:20:17,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:17,851 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-12-14 05:20:17,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-12-14 05:20:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:20:17,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:17,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:17,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489115297] [2022-12-14 05:20:17,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489115297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:17,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:17,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:20:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618087302] [2022-12-14 05:20:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:17,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:17,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:17,906 INFO L87 Difference]: Start difference. First operand 2591 states and 8051 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:18,124 INFO L93 Difference]: Finished difference Result 1985 states and 5861 transitions. [2022-12-14 05:20:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:18,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 [2022-12-14 05:20:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:18,129 INFO L225 Difference]: With dead ends: 1985 [2022-12-14 05:20:18,129 INFO L226 Difference]: Without dead ends: 1985 [2022-12-14 05:20:18,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:18,130 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:18,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:20:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-12-14 05:20:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1985. [2022-12-14 05:20:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1892 states have (on average 3.0977801268498943) internal successors, (5861), 1984 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 5861 transitions. [2022-12-14 05:20:18,159 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 5861 transitions. Word has length 3 [2022-12-14 05:20:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:18,159 INFO L495 AbstractCegarLoop]: Abstraction has 1985 states and 5861 transitions. [2022-12-14 05:20:18,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 5861 transitions. [2022-12-14 05:20:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:20:18,159 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:18,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:20:18,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 05:20:18,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:18,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 843649, now seen corresponding path program 1 times [2022-12-14 05:20:18,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:18,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443325199] [2022-12-14 05:20:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:18,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:18,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:18,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:18,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 05:20:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:20:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:18,577 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:18,577 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:18,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:18,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443325199] [2022-12-14 05:20:18,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443325199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [733932028] [2022-12-14 05:20:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:18,800 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:18,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:18,801 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:18,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 05:20:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:18,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:20:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:18,993 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:18,994 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:19,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:19,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [733932028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:19,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685765410] [2022-12-14 05:20:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:19,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:19,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:20:19,086 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:20:19,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:20:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:20:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:19,229 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:19,230 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:19,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:19,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685765410] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:19,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:20:19,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 05:20:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125161426] [2022-12-14 05:20:19,376 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:20:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:20:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:20:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:20:19,377 INFO L87 Difference]: Start difference. First operand 1985 states and 5861 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) [2022-12-14 05:20:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:20,847 INFO L93 Difference]: Finished difference Result 5950 states and 17579 transitions. [2022-12-14 05:20:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:20:20,848 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 [2022-12-14 05:20:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:20,867 INFO L225 Difference]: With dead ends: 5950 [2022-12-14 05:20:20,867 INFO L226 Difference]: Without dead ends: 5950 [2022-12-14 05:20:20,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:20:20,868 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 359 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:20,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 12 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 05:20:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2022-12-14 05:20:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 1988. [2022-12-14 05:20:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1895 states have (on average 3.096042216358839) internal successors, (5867), 1987 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5867 transitions. [2022-12-14 05:20:20,921 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5867 transitions. Word has length 3 [2022-12-14 05:20:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:20,921 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 5867 transitions. [2022-12-14 05:20:20,921 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) [2022-12-14 05:20:20,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5867 transitions. [2022-12-14 05:20:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:20:20,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:20,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:20:20,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:20:21,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 05:20:21,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 05:20:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:21,525 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash 810882781, now seen corresponding path program 1 times [2022-12-14 05:20:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:21,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487353512] [2022-12-14 05:20:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:21,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:21,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:21,532 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:21,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 05:20:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:21,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:20:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:21,651 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 05:20:21,651 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 05:20:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:20:21,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:21,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:21,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487353512] [2022-12-14 05:20:21,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487353512] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:21,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:21,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:20:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489383708] [2022-12-14 05:20:21,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:21,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:21,736 INFO L87 Difference]: Start difference. First operand 1988 states and 5867 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:21,890 INFO L93 Difference]: Finished difference Result 1922 states and 5697 transitions. [2022-12-14 05:20:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-12-14 05:20:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:21,896 INFO L225 Difference]: With dead ends: 1922 [2022-12-14 05:20:21,896 INFO L226 Difference]: Without dead ends: 1922 [2022-12-14 05:20:21,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:21,897 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:21,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:20:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-12-14 05:20:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1922. [2022-12-14 05:20:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1844 states have (on average 3.089479392624729) internal successors, (5697), 1921 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 5697 transitions. [2022-12-14 05:20:21,928 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 5697 transitions. Word has length 5 [2022-12-14 05:20:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:21,928 INFO L495 AbstractCegarLoop]: Abstraction has 1922 states and 5697 transitions. [2022-12-14 05:20:21,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 5697 transitions. [2022-12-14 05:20:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:20:21,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:21,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:20:21,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 05:20:22,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:22,130 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash 810882782, now seen corresponding path program 1 times [2022-12-14 05:20:22,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:22,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185607601] [2022-12-14 05:20:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:22,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:22,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:22,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:22,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 05:20:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:20:22,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:22,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:22,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:22,286 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 05:20:22,286 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-14 05:20:22,297 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 [2022-12-14 05:20:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:22,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:22,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185607601] [2022-12-14 05:20:22,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185607601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [180292006] [2022-12-14 05:20:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:22,662 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:22,663 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:22,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 05:20:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:22,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:20:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:22,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:22,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:22,873 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 05:20:22,873 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-14 05:20:22,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-14 05:20:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:20:22,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:22,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [180292006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:22,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:20:22,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 05:20:22,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479434842] [2022-12-14 05:20:22,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:22,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:22,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:22,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:22,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:20:22,955 INFO L87 Difference]: Start difference. First operand 1922 states and 5697 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:23,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:23,112 INFO L93 Difference]: Finished difference Result 1856 states and 5527 transitions. [2022-12-14 05:20:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:23,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-12-14 05:20:23,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:23,117 INFO L225 Difference]: With dead ends: 1856 [2022-12-14 05:20:23,117 INFO L226 Difference]: Without dead ends: 1856 [2022-12-14 05:20:23,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:20:23,117 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:23,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:20:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2022-12-14 05:20:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1856. [2022-12-14 05:20:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1793 states have (on average 3.082543223647518) internal successors, (5527), 1855 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5527 transitions. [2022-12-14 05:20:23,144 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5527 transitions. Word has length 5 [2022-12-14 05:20:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:23,144 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 5527 transitions. [2022-12-14 05:20:23,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5527 transitions. [2022-12-14 05:20:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:20:23,145 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:23,145 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 05:20:23,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 05:20:23,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 05:20:23,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:23,546 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash -633409307, now seen corresponding path program 2 times [2022-12-14 05:20:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:23,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72807414] [2022-12-14 05:20:23,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:20:23,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:23,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:23,551 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:23,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 05:20:23,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:20:23,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:23,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:20:23,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:23,720 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:23,721 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:23,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:24,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:24,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72807414] [2022-12-14 05:20:24,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72807414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:24,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [349971716] [2022-12-14 05:20:24,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:20:24,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:24,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:24,494 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:24,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 05:20:24,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:20:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:20:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:24,734 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:24,734 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:24,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:24,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [349971716] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:24,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542707908] [2022-12-14 05:20:24,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:20:24,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:20:24,912 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:20:24,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:20:25,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:20:25,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:20:25,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:25,128 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:25,128 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:25,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542707908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:25,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:20:25,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 05:20:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956960687] [2022-12-14 05:20:25,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:20:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:20:25,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:20:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:20:25,317 INFO L87 Difference]: Start difference. First operand 1856 states and 5527 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) [2022-12-14 05:20:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:29,671 INFO L93 Difference]: Finished difference Result 16654 states and 49667 transitions. [2022-12-14 05:20:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:20:29,672 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 [2022-12-14 05:20:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:29,712 INFO L225 Difference]: With dead ends: 16654 [2022-12-14 05:20:29,712 INFO L226 Difference]: Without dead ends: 16654 [2022-12-14 05:20:29,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:20:29,713 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 943 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:29,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 72 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 05:20:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16654 states. [2022-12-14 05:20:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16654 to 1862. [2022-12-14 05:20:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1799 states have (on average 3.07893274041134) internal successors, (5539), 1861 states have internal predecessors, (5539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5539 transitions. [2022-12-14 05:20:29,832 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5539 transitions. Word has length 6 [2022-12-14 05:20:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:29,832 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 5539 transitions. [2022-12-14 05:20:29,832 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) [2022-12-14 05:20:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5539 transitions. [2022-12-14 05:20:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:20:29,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:29,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:29,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:20:30,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 05:20:30,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 05:20:30,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:30,435 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:30,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1869293817, now seen corresponding path program 1 times [2022-12-14 05:20:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:30,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613414301] [2022-12-14 05:20:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:30,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:30,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:30,439 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:30,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 05:20:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:30,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:20:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:30,632 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-12-14 05:20:30,633 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 3 case distinctions, treesize of input 15 treesize of output 46 [2022-12-14 05:20:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:20:30,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:30,652 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:30,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613414301] [2022-12-14 05:20:30,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613414301] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:30,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:30,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:20:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694820235] [2022-12-14 05:20:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:30,654 INFO L87 Difference]: Start difference. First operand 1862 states and 5539 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:30,775 INFO L93 Difference]: Finished difference Result 1736 states and 5189 transitions. [2022-12-14 05:20:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-12-14 05:20:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:30,786 INFO L225 Difference]: With dead ends: 1736 [2022-12-14 05:20:30,786 INFO L226 Difference]: Without dead ends: 1736 [2022-12-14 05:20:30,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:20:30,787 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:30,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:20:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-12-14 05:20:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1736. [2022-12-14 05:20:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1686 states have (on average 3.0776986951364176) internal successors, (5189), 1735 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5189 transitions. [2022-12-14 05:20:30,822 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5189 transitions. Word has length 7 [2022-12-14 05:20:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:30,823 INFO L495 AbstractCegarLoop]: Abstraction has 1736 states and 5189 transitions. [2022-12-14 05:20:30,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5189 transitions. [2022-12-14 05:20:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:20:30,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:30,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:30,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 05:20:31,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:31,024 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:31,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1869293818, now seen corresponding path program 1 times [2022-12-14 05:20:31,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:31,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136242914] [2022-12-14 05:20:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:31,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:31,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:31,026 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:31,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 05:20:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:20:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:31,242 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:31,242 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:31,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:31,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:31,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136242914] [2022-12-14 05:20:31,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136242914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:31,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [580046228] [2022-12-14 05:20:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:31,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:31,599 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:31,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 05:20:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:20:31,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:20:31,804 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 05:20:31,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 05:20:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:20:31,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:31,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [580046228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:31,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:20:31,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 05:20:31,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266019914] [2022-12-14 05:20:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:31,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:20:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:20:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:20:31,874 INFO L87 Difference]: Start difference. First operand 1736 states and 5189 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:32,003 INFO L93 Difference]: Finished difference Result 1610 states and 4839 transitions. [2022-12-14 05:20:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:20:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-12-14 05:20:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:32,008 INFO L225 Difference]: With dead ends: 1610 [2022-12-14 05:20:32,008 INFO L226 Difference]: Without dead ends: 1610 [2022-12-14 05:20:32,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:20:32,009 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:32,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:20:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-12-14 05:20:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2022-12-14 05:20:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1573 states have (on average 3.076287349014622) internal successors, (4839), 1609 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 4839 transitions. [2022-12-14 05:20:32,047 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 4839 transitions. Word has length 7 [2022-12-14 05:20:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:32,047 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 4839 transitions. [2022-12-14 05:20:32,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 4839 transitions. [2022-12-14 05:20:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:20:32,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:32,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:32,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 05:20:32,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 05:20:32,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:32,450 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2110592379, now seen corresponding path program 1 times [2022-12-14 05:20:32,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:32,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350326343] [2022-12-14 05:20:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:32,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:32,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:32,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 05:20:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:32,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:20:32,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:32,597 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 05:20:32,598 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 05:20:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:20:32,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:32,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:32,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350326343] [2022-12-14 05:20:32,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350326343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:32,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:32,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:20:32,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961607298] [2022-12-14 05:20:32,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:32,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:20:32,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:32,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:20:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:20:32,620 INFO L87 Difference]: Start difference. First operand 1610 states and 4839 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-12-14 05:20:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:32,745 INFO L93 Difference]: Finished difference Result 1124 states and 3290 transitions. [2022-12-14 05:20:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:20:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2022-12-14 05:20:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:32,748 INFO L225 Difference]: With dead ends: 1124 [2022-12-14 05:20:32,748 INFO L226 Difference]: Without dead ends: 1124 [2022-12-14 05:20:32,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:20:32,748 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:32,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:20:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-12-14 05:20:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2022-12-14 05:20:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1111 states have (on average 2.961296129612961) internal successors, (3290), 1123 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3290 transitions. [2022-12-14 05:20:32,761 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3290 transitions. Word has length 8 [2022-12-14 05:20:32,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:32,761 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 3290 transitions. [2022-12-14 05:20:32,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-12-14 05:20:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3290 transitions. [2022-12-14 05:20:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:20:32,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:32,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:32,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-14 05:20:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:32,963 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1003851060, now seen corresponding path program 1 times [2022-12-14 05:20:32,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:32,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482864065] [2022-12-14 05:20:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:32,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:32,968 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:32,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 05:20:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:20:33,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:33,184 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:33,184 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:33,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:33,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:33,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482864065] [2022-12-14 05:20:33,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482864065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:33,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [59737353] [2022-12-14 05:20:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:33,741 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:33,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:33,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 05:20:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:33,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:20:33,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:33,944 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:33,944 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:34,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:34,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [59737353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:34,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109662295] [2022-12-14 05:20:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:34,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:34,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:20:34,254 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:20:34,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 05:20:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:20:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:34,428 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:34,428 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:34,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:34,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109662295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:34,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:20:34,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-12-14 05:20:34,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212465327] [2022-12-14 05:20:34,715 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:20:34,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:20:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:20:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:20:34,716 INFO L87 Difference]: Start difference. First operand 1124 states and 3290 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:37,102 INFO L93 Difference]: Finished difference Result 3082 states and 8984 transitions. [2022-12-14 05:20:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:20:37,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 9 [2022-12-14 05:20:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:37,108 INFO L225 Difference]: With dead ends: 3082 [2022-12-14 05:20:37,108 INFO L226 Difference]: Without dead ends: 3082 [2022-12-14 05:20:37,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:20:37,109 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 216 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:37,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 2 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 05:20:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2022-12-14 05:20:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 1487. [2022-12-14 05:20:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1474 states have (on average 3.0088195386702847) internal successors, (4435), 1486 states have internal predecessors, (4435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4435 transitions. [2022-12-14 05:20:37,135 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4435 transitions. Word has length 9 [2022-12-14 05:20:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:37,136 INFO L495 AbstractCegarLoop]: Abstraction has 1487 states and 4435 transitions. [2022-12-14 05:20:37,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4435 transitions. [2022-12-14 05:20:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:20:37,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:37,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:37,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 05:20:37,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 05:20:37,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 05:20:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:37,739 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1095047290, now seen corresponding path program 1 times [2022-12-14 05:20:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:37,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763939496] [2022-12-14 05:20:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:37,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:37,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:37,743 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:37,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 05:20:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:20:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:37,976 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:37,976 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:38,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:38,909 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:38,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763939496] [2022-12-14 05:20:38,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763939496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:38,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488153651] [2022-12-14 05:20:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:38,910 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:38,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:38,910 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:38,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 05:20:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:20:39,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:39,129 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:39,130 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:39,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:39,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1488153651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855918740] [2022-12-14 05:20:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:39,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:39,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:20:39,572 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:20:39,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 05:20:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:20:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:39,740 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:39,740 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:39,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:40,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855918740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:40,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:20:40,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-12-14 05:20:40,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016196291] [2022-12-14 05:20:40,098 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:20:40,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:20:40,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:20:40,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:20:40,099 INFO L87 Difference]: Start difference. First operand 1487 states and 4435 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:43,144 INFO L93 Difference]: Finished difference Result 2690 states and 7722 transitions. [2022-12-14 05:20:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:20:43,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 9 [2022-12-14 05:20:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:43,150 INFO L225 Difference]: With dead ends: 2690 [2022-12-14 05:20:43,150 INFO L226 Difference]: Without dead ends: 2690 [2022-12-14 05:20:43,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:20:43,150 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 309 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:43,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 14 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 05:20:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-12-14 05:20:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 1653. [2022-12-14 05:20:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1640 states have (on average 3.0390243902439025) internal successors, (4984), 1652 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4984 transitions. [2022-12-14 05:20:43,176 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4984 transitions. Word has length 9 [2022-12-14 05:20:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:43,176 INFO L495 AbstractCegarLoop]: Abstraction has 1653 states and 4984 transitions. [2022-12-14 05:20:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4984 transitions. [2022-12-14 05:20:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:20:43,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:43,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:43,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 05:20:43,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-12-14 05:20:43,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-14 05:20:43,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:43,778 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1095047149, now seen corresponding path program 1 times [2022-12-14 05:20:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:43,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221584225] [2022-12-14 05:20:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:43,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:43,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:43,783 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:43,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 05:20:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:43,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:20:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:43,959 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:43,959 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:44,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:44,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221584225] [2022-12-14 05:20:44,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221584225] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [208068808] [2022-12-14 05:20:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:44,685 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:44,686 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:44,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 05:20:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:20:44,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:44,954 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:44,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:45,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:45,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [208068808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:45,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948666624] [2022-12-14 05:20:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:45,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:45,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:20:45,271 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:20:45,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 05:20:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:20:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:45,460 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:45,461 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:45,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:45,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948666624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:45,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:20:45,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-12-14 05:20:45,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072052459] [2022-12-14 05:20:45,756 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:20:45,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:20:45,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:20:45,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:20:45,757 INFO L87 Difference]: Start difference. First operand 1653 states and 4984 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:48,119 INFO L93 Difference]: Finished difference Result 2298 states and 6460 transitions. [2022-12-14 05:20:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:20:48,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 9 [2022-12-14 05:20:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:48,125 INFO L225 Difference]: With dead ends: 2298 [2022-12-14 05:20:48,125 INFO L226 Difference]: Without dead ends: 2298 [2022-12-14 05:20:48,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:20:48,125 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 259 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:48,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 18 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 05:20:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-12-14 05:20:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1583. [2022-12-14 05:20:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1570 states have (on average 2.938216560509554) internal successors, (4613), 1582 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4613 transitions. [2022-12-14 05:20:48,154 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4613 transitions. Word has length 9 [2022-12-14 05:20:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:48,155 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 4613 transitions. [2022-12-14 05:20:48,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4613 transitions. [2022-12-14 05:20:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:20:48,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:48,155 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:48,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 05:20:48,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 05:20:48,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 05:20:48,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:48,757 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash 476447640, now seen corresponding path program 2 times [2022-12-14 05:20:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:48,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776291300] [2022-12-14 05:20:48,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:20:48,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:48,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:48,762 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:48,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 05:20:48,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:20:48,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:48,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:20:48,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:48,936 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:48,936 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:20:49,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:49,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776291300] [2022-12-14 05:20:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776291300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:49,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:20:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622047217] [2022-12-14 05:20:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:49,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:20:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:20:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:20:49,056 INFO L87 Difference]: Start difference. First operand 1583 states and 4613 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:49,337 INFO L93 Difference]: Finished difference Result 1451 states and 4193 transitions. [2022-12-14 05:20:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:20:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 [2022-12-14 05:20:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:49,339 INFO L225 Difference]: With dead ends: 1451 [2022-12-14 05:20:49,339 INFO L226 Difference]: Without dead ends: 1451 [2022-12-14 05:20:49,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:20:49,340 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:49,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:20:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-12-14 05:20:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1381. [2022-12-14 05:20:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1371 states have (on average 2.9307075127644056) internal successors, (4018), 1380 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4018 transitions. [2022-12-14 05:20:49,355 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4018 transitions. Word has length 12 [2022-12-14 05:20:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:49,356 INFO L495 AbstractCegarLoop]: Abstraction has 1381 states and 4018 transitions. [2022-12-14 05:20:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4018 transitions. [2022-12-14 05:20:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:20:49,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:49,356 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:49,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 05:20:49,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:49,558 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:49,559 INFO L85 PathProgramCache]: Analyzing trace with hash 567643870, now seen corresponding path program 2 times [2022-12-14 05:20:49,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:49,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825013735] [2022-12-14 05:20:49,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:20:49,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:49,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:49,563 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:49,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 05:20:49,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:20:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:49,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:20:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:49,756 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:49,756 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:20:49,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:49,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825013735] [2022-12-14 05:20:49,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825013735] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:49,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:49,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:20:49,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885628162] [2022-12-14 05:20:49,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:49,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:20:49,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:20:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:20:49,858 INFO L87 Difference]: Start difference. First operand 1381 states and 4018 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:50,018 INFO L93 Difference]: Finished difference Result 1185 states and 3387 transitions. [2022-12-14 05:20:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:20:50,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 [2022-12-14 05:20:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:50,020 INFO L225 Difference]: With dead ends: 1185 [2022-12-14 05:20:50,021 INFO L226 Difference]: Without dead ends: 1185 [2022-12-14 05:20:50,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:20:50,021 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:50,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:20:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-12-14 05:20:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1185. [2022-12-14 05:20:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1178 states have (on average 2.8752122241086586) internal successors, (3387), 1184 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3387 transitions. [2022-12-14 05:20:50,035 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3387 transitions. Word has length 12 [2022-12-14 05:20:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:50,035 INFO L495 AbstractCegarLoop]: Abstraction has 1185 states and 3387 transitions. [2022-12-14 05:20:50,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3387 transitions. [2022-12-14 05:20:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:20:50,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:50,035 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:50,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-14 05:20:50,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:50,237 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:50,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:50,238 INFO L85 PathProgramCache]: Analyzing trace with hash 567643729, now seen corresponding path program 2 times [2022-12-14 05:20:50,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:50,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526586055] [2022-12-14 05:20:50,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:20:50,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:50,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:50,242 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 05:20:50,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:20:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:20:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:50,425 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:50,426 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:20:50,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:20:50,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526586055] [2022-12-14 05:20:50,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526586055] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:50,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:50,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:20:50,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911679658] [2022-12-14 05:20:50,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:50,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:20:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:20:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:20:50,538 INFO L87 Difference]: Start difference. First operand 1185 states and 3387 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:50,763 INFO L93 Difference]: Finished difference Result 989 states and 2756 transitions. [2022-12-14 05:20:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:20:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 [2022-12-14 05:20:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:50,765 INFO L225 Difference]: With dead ends: 989 [2022-12-14 05:20:50,765 INFO L226 Difference]: Without dead ends: 989 [2022-12-14 05:20:50,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:20:50,766 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 79 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:50,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 4 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:20:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-12-14 05:20:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 600. [2022-12-14 05:20:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 596 states have (on average 2.697986577181208) internal successors, (1608), 599 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1608 transitions. [2022-12-14 05:20:50,774 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1608 transitions. Word has length 12 [2022-12-14 05:20:50,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:50,774 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 1608 transitions. [2022-12-14 05:20:50,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:20:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1608 transitions. [2022-12-14 05:20:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:20:50,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:50,774 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 05:20:50,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-14 05:20:50,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:50,975 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:20:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1665477477, now seen corresponding path program 3 times [2022-12-14 05:20:50,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:20:50,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613198132] [2022-12-14 05:20:50,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:20:50,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:20:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:20:50,981 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:20:50,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 05:20:51,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:20:51,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:51,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:20:51,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:51,334 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:51,335 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:51,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:53,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:20:53,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613198132] [2022-12-14 05:20:53,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613198132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:53,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1150106575] [2022-12-14 05:20:53,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:20:53,933 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:20:53,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:20:53,934 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:20:53,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 05:20:54,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:20:54,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:20:54,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:54,621 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:54,621 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:54,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:55,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1150106575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:55,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948092501] [2022-12-14 05:20:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:20:55,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:55,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:20:55,057 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:20:55,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 05:20:57,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:20:57,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:20:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:20:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:57,893 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:20:57,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:20:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:58,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:20:58,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948092501] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:58,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:20:58,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-12-14 05:20:58,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429296396] [2022-12-14 05:20:58,381 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:20:58,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 05:20:58,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:20:58,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 05:20:58,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-14 05:20:58,382 INFO L87 Difference]: Start difference. First operand 600 states and 1608 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:18,284 INFO L93 Difference]: Finished difference Result 12352 states and 33332 transitions. [2022-12-14 05:21:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 05:21:18,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 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 [2022-12-14 05:21:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:18,302 INFO L225 Difference]: With dead ends: 12352 [2022-12-14 05:21:18,302 INFO L226 Difference]: Without dead ends: 12352 [2022-12-14 05:21:18,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:21:18,303 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4064 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4064 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:18,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4064 Valid, 240 Invalid, 3758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-12-14 05:21:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12352 states. [2022-12-14 05:21:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12352 to 612. [2022-12-14 05:21:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 608 states have (on average 2.6842105263157894) internal successors, (1632), 611 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1632 transitions. [2022-12-14 05:21:18,363 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1632 transitions. Word has length 12 [2022-12-14 05:21:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:18,363 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 1632 transitions. [2022-12-14 05:21:18,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1632 transitions. [2022-12-14 05:21:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:21:18,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:18,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:18,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 05:21:18,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 05:21:18,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 05:21:18,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:18,966 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1767844279, now seen corresponding path program 1 times [2022-12-14 05:21:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:18,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471677383] [2022-12-14 05:21:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:18,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:18,971 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 05:21:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:19,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:21:19,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:21:19,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:19,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471677383] [2022-12-14 05:21:19,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471677383] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:19,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:19,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:21:19,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291186603] [2022-12-14 05:21:19,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:19,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:21:19,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:19,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:21:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:19,126 INFO L87 Difference]: Start difference. First operand 612 states and 1632 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:19,749 INFO L93 Difference]: Finished difference Result 1130 states and 3018 transitions. [2022-12-14 05:21:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:21:19,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:21:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:19,751 INFO L225 Difference]: With dead ends: 1130 [2022-12-14 05:21:19,751 INFO L226 Difference]: Without dead ends: 1130 [2022-12-14 05:21:19,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:21:19,752 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 135 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:19,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 26 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:21:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-12-14 05:21:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 720. [2022-12-14 05:21:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 716 states have (on average 2.6815642458100557) internal successors, (1920), 719 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1920 transitions. [2022-12-14 05:21:19,763 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1920 transitions. Word has length 17 [2022-12-14 05:21:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:19,763 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1920 transitions. [2022-12-14 05:21:19,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1920 transitions. [2022-12-14 05:21:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:21:19,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:19,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:19,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-12-14 05:21:19,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:19,965 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash 982610809, now seen corresponding path program 2 times [2022-12-14 05:21:19,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:19,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305888819] [2022-12-14 05:21:19,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:21:19,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:19,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:19,970 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:19,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 05:21:20,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:21:20,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:21:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:21:20,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:20,128 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:20,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305888819] [2022-12-14 05:21:20,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305888819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:20,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:20,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:21:20,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170574930] [2022-12-14 05:21:20,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:20,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:21:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:21:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:21:20,128 INFO L87 Difference]: Start difference. First operand 720 states and 1920 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:20,293 INFO L93 Difference]: Finished difference Result 690 states and 1818 transitions. [2022-12-14 05:21:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:21:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:21:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:20,295 INFO L225 Difference]: With dead ends: 690 [2022-12-14 05:21:20,295 INFO L226 Difference]: Without dead ends: 690 [2022-12-14 05:21:20,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:21:20,296 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:20,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 5 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:21:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-12-14 05:21:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2022-12-14 05:21:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 686 states have (on average 2.6501457725947524) internal successors, (1818), 689 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1818 transitions. [2022-12-14 05:21:20,304 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1818 transitions. Word has length 17 [2022-12-14 05:21:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:20,305 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1818 transitions. [2022-12-14 05:21:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1818 transitions. [2022-12-14 05:21:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:21:20,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:20,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:20,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-12-14 05:21:20,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:20,506 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1250036609, now seen corresponding path program 1 times [2022-12-14 05:21:20,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:20,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612521990] [2022-12-14 05:21:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:20,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:20,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:20,512 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:20,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-12-14 05:21:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:20,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:21:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:21:20,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:20,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612521990] [2022-12-14 05:21:20,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612521990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:20,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:20,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:21:20,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655540527] [2022-12-14 05:21:20,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:20,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:21:20,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:21:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:20,698 INFO L87 Difference]: Start difference. First operand 690 states and 1818 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:21,321 INFO L93 Difference]: Finished difference Result 1242 states and 3266 transitions. [2022-12-14 05:21:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:21:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:21:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:21,323 INFO L225 Difference]: With dead ends: 1242 [2022-12-14 05:21:21,323 INFO L226 Difference]: Without dead ends: 1242 [2022-12-14 05:21:21,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:21:21,324 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 141 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:21,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 25 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:21:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-12-14 05:21:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 696. [2022-12-14 05:21:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 692 states have (on average 2.653179190751445) internal successors, (1836), 695 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1836 transitions. [2022-12-14 05:21:21,335 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1836 transitions. Word has length 17 [2022-12-14 05:21:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:21,335 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1836 transitions. [2022-12-14 05:21:21,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1836 transitions. [2022-12-14 05:21:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:21:21,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:21,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:21,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-12-14 05:21:21,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:21,537 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash -797121967, now seen corresponding path program 2 times [2022-12-14 05:21:21,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942831574] [2022-12-14 05:21:21,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:21:21,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:21,542 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:21,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 05:21:21,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:21:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:21:21,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:21:21,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:21,646 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942831574] [2022-12-14 05:21:21,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942831574] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:21,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:21,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:21:21,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914507972] [2022-12-14 05:21:21,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:21,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:21:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:21:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:21:21,647 INFO L87 Difference]: Start difference. First operand 696 states and 1836 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:21,801 INFO L93 Difference]: Finished difference Result 696 states and 1830 transitions. [2022-12-14 05:21:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:21:21,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:21:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:21,803 INFO L225 Difference]: With dead ends: 696 [2022-12-14 05:21:21,803 INFO L226 Difference]: Without dead ends: 696 [2022-12-14 05:21:21,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:21:21,803 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:21,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:21:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-12-14 05:21:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 696. [2022-12-14 05:21:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 692 states have (on average 2.6445086705202314) internal successors, (1830), 695 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1830 transitions. [2022-12-14 05:21:21,810 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1830 transitions. Word has length 17 [2022-12-14 05:21:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:21,811 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1830 transitions. [2022-12-14 05:21:21,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1830 transitions. [2022-12-14 05:21:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:21:21,812 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:21,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:21,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-12-14 05:21:22,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:22,013 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:22,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:22,014 INFO L85 PathProgramCache]: Analyzing trace with hash 678581803, now seen corresponding path program 3 times [2022-12-14 05:21:22,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:22,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377535134] [2022-12-14 05:21:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:21:22,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:22,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:22,018 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:22,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 05:21:22,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 05:21:22,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:22,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:21:22,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:21:22,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:22,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377535134] [2022-12-14 05:21:22,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377535134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:22,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:22,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:21:22,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956980110] [2022-12-14 05:21:22,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:22,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:21:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:21:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:22,188 INFO L87 Difference]: Start difference. First operand 696 states and 1830 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:22,737 INFO L93 Difference]: Finished difference Result 944 states and 2400 transitions. [2022-12-14 05:21:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:21:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:21:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:22,738 INFO L225 Difference]: With dead ends: 944 [2022-12-14 05:21:22,738 INFO L226 Difference]: Without dead ends: 944 [2022-12-14 05:21:22,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:21:22,739 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:22,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 22 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:21:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-12-14 05:21:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 702. [2022-12-14 05:21:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 698 states have (on average 2.638968481375358) internal successors, (1842), 701 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1842 transitions. [2022-12-14 05:21:22,751 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1842 transitions. Word has length 17 [2022-12-14 05:21:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:22,752 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 1842 transitions. [2022-12-14 05:21:22,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1842 transitions. [2022-12-14 05:21:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:21:22,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:22,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:22,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-14 05:21:22,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:22,953 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1668574457, now seen corresponding path program 4 times [2022-12-14 05:21:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:22,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129209300] [2022-12-14 05:21:22,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:21:22,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:22,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:22,959 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:22,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-12-14 05:21:23,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:21:23,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:23,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:21:23,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:21:23,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:23,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:23,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129209300] [2022-12-14 05:21:23,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129209300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:23,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:23,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:21:23,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664524915] [2022-12-14 05:21:23,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:23,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:21:23,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:21:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:23,126 INFO L87 Difference]: Start difference. First operand 702 states and 1842 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:23,869 INFO L93 Difference]: Finished difference Result 1170 states and 3044 transitions. [2022-12-14 05:21:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:21:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:21:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:23,871 INFO L225 Difference]: With dead ends: 1170 [2022-12-14 05:21:23,871 INFO L226 Difference]: Without dead ends: 1170 [2022-12-14 05:21:23,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:21:23,871 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 128 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:23,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 24 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:21:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-12-14 05:21:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 696. [2022-12-14 05:21:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 692 states have (on average 2.6445086705202314) internal successors, (1830), 695 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1830 transitions. [2022-12-14 05:21:23,882 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1830 transitions. Word has length 17 [2022-12-14 05:21:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:23,882 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1830 transitions. [2022-12-14 05:21:23,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1830 transitions. [2022-12-14 05:21:23,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:21:23,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:23,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:23,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-12-14 05:21:24,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:24,084 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1097119651, now seen corresponding path program 5 times [2022-12-14 05:21:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:24,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259218974] [2022-12-14 05:21:24,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 05:21:24,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:24,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:24,089 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:24,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 05:21:24,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:21:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:21:24,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:21:24,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:24,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259218974] [2022-12-14 05:21:24,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259218974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:24,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:24,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:21:24,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775848845] [2022-12-14 05:21:24,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:24,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:21:24,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:21:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:24,288 INFO L87 Difference]: Start difference. First operand 696 states and 1830 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:24,760 INFO L93 Difference]: Finished difference Result 944 states and 2400 transitions. [2022-12-14 05:21:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:21:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:21:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:24,762 INFO L225 Difference]: With dead ends: 944 [2022-12-14 05:21:24,762 INFO L226 Difference]: Without dead ends: 944 [2022-12-14 05:21:24,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:21:24,763 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:24,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 23 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:21:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-12-14 05:21:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 690. [2022-12-14 05:21:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 686 states have (on average 2.641399416909621) internal successors, (1812), 689 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1812 transitions. [2022-12-14 05:21:24,771 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1812 transitions. Word has length 17 [2022-12-14 05:21:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:24,771 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1812 transitions. [2022-12-14 05:21:24,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1812 transitions. [2022-12-14 05:21:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:21:24,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:24,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:24,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-12-14 05:21:24,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:24,973 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:24,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1276694265, now seen corresponding path program 6 times [2022-12-14 05:21:24,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:24,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369354653] [2022-12-14 05:21:24,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 05:21:24,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:24,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:24,979 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:24,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 05:21:25,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-14 05:21:25,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:25,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:21:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:21:25,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:25,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369354653] [2022-12-14 05:21:25,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369354653] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:25,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:25,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:21:25,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418850434] [2022-12-14 05:21:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:25,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:21:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:21:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:25,120 INFO L87 Difference]: Start difference. First operand 690 states and 1812 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:25,562 INFO L93 Difference]: Finished difference Result 696 states and 1660 transitions. [2022-12-14 05:21:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:21:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:21:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:25,563 INFO L225 Difference]: With dead ends: 696 [2022-12-14 05:21:25,563 INFO L226 Difference]: Without dead ends: 696 [2022-12-14 05:21:25,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:21:25,564 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:25,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 20 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:21:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-12-14 05:21:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 522. [2022-12-14 05:21:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 518 states have (on average 2.4555984555984556) internal successors, (1272), 521 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1272 transitions. [2022-12-14 05:21:25,573 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1272 transitions. Word has length 17 [2022-12-14 05:21:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:25,573 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 1272 transitions. [2022-12-14 05:21:25,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1272 transitions. [2022-12-14 05:21:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 05:21:25,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:25,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:25,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 05:21:25,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:25,776 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1414792228, now seen corresponding path program 1 times [2022-12-14 05:21:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:25,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737746205] [2022-12-14 05:21:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:25,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:25,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:25,783 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:25,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 05:21:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:21:25,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:26,057 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:21:26,057 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:21:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:26,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:21:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:27,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:27,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737746205] [2022-12-14 05:21:27,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737746205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:21:27,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1497017879] [2022-12-14 05:21:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:27,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:21:27,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:21:27,233 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:21:27,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 05:21:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:27,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:21:27,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:27,509 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:21:27,509 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:21:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:27,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:21:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:28,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1497017879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:21:28,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099462288] [2022-12-14 05:21:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:28,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:28,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:21:28,280 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:21:28,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 05:21:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:21:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:28,495 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:21:28,495 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:21:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:28,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:21:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:29,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099462288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:21:29,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:21:29,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 05:21:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290961036] [2022-12-14 05:21:29,145 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:21:29,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:21:29,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:21:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:21:29,147 INFO L87 Difference]: Start difference. First operand 522 states and 1272 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:35,864 INFO L93 Difference]: Finished difference Result 1484 states and 3654 transitions. [2022-12-14 05:21:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:21:35,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 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 19 [2022-12-14 05:21:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:35,867 INFO L225 Difference]: With dead ends: 1484 [2022-12-14 05:21:35,867 INFO L226 Difference]: Without dead ends: 1484 [2022-12-14 05:21:35,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:21:35,867 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 329 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:35,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 4 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 05:21:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-12-14 05:21:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 939. [2022-12-14 05:21:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 935 states have (on average 2.5037433155080215) internal successors, (2341), 938 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2341 transitions. [2022-12-14 05:21:35,879 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2341 transitions. Word has length 19 [2022-12-14 05:21:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:35,880 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 2341 transitions. [2022-12-14 05:21:35,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2341 transitions. [2022-12-14 05:21:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 05:21:35,882 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:35,882 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:35,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-12-14 05:21:36,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 05:21:36,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 05:21:36,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:36,485 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1409891008, now seen corresponding path program 2 times [2022-12-14 05:21:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:36,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52666579] [2022-12-14 05:21:36,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:21:36,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:36,488 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:36,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 05:21:36,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:21:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:21:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:36,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:21:36,804 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:21:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:21:37,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:37,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52666579] [2022-12-14 05:21:37,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52666579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:37,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:37,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:21:37,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268826969] [2022-12-14 05:21:37,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:37,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:21:37,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:37,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:21:37,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:21:37,044 INFO L87 Difference]: Start difference. First operand 939 states and 2341 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:37,341 INFO L93 Difference]: Finished difference Result 923 states and 2307 transitions. [2022-12-14 05:21:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:21:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 05:21:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:37,343 INFO L225 Difference]: With dead ends: 923 [2022-12-14 05:21:37,343 INFO L226 Difference]: Without dead ends: 923 [2022-12-14 05:21:37,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:37,344 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:37,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:21:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-12-14 05:21:37,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 506. [2022-12-14 05:21:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 504 states have (on average 2.4563492063492065) internal successors, (1238), 505 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1238 transitions. [2022-12-14 05:21:37,350 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1238 transitions. Word has length 22 [2022-12-14 05:21:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:37,350 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 1238 transitions. [2022-12-14 05:21:37,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:21:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1238 transitions. [2022-12-14 05:21:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 05:21:37,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:37,351 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-12-14 05:21:37,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-12-14 05:21:37,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:37,552 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:21:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1297612901, now seen corresponding path program 4 times [2022-12-14 05:21:37,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:21:37,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552940096] [2022-12-14 05:21:37,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:21:37,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:21:37,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:21:37,553 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:21:37,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 05:21:37,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:21:37,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 05:21:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:37,875 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:21:37,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:21:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:39,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:21:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:49,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:21:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552940096] [2022-12-14 05:21:49,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552940096] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:21:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1855376076] [2022-12-14 05:21:49,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:21:49,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:21:49,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:21:49,830 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:21:49,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 05:21:50,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:21:50,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:50,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 05:21:50,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:50,317 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:21:50,317 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:21:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:51,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:21:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:53,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1855376076] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:21:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349662999] [2022-12-14 05:21:53,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:21:53,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:21:53,365 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:21:53,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 05:21:53,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:21:53,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:21:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 05:21:53,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:53,642 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:21:53,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:21:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:53,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:21:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:21:54,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349662999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:21:54,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:21:54,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 62 [2022-12-14 05:21:54,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984922579] [2022-12-14 05:21:54,981 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:21:54,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 05:21:54,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:21:54,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 05:21:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2979, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 05:21:54,983 INFO L87 Difference]: Start difference. First operand 506 states and 1238 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:22:23,575 WARN L233 SmtUtils]: Spent 15.52s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:22:40,277 WARN L233 SmtUtils]: Spent 14.64s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:23:11,811 WARN L233 SmtUtils]: Spent 29.64s on a formula simplification. DAG size of input: 254 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:23:25,661 WARN L233 SmtUtils]: Spent 12.49s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:23:53,503 WARN L233 SmtUtils]: Spent 25.87s on a formula simplification. DAG size of input: 246 DAG size of output: 246 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:24:05,003 WARN L233 SmtUtils]: Spent 10.25s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:24:32,226 WARN L233 SmtUtils]: Spent 25.23s on a formula simplification. DAG size of input: 236 DAG size of output: 236 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:24:42,949 WARN L233 SmtUtils]: Spent 9.42s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:25:03,479 WARN L233 SmtUtils]: Spent 18.31s on a formula simplification. DAG size of input: 225 DAG size of output: 225 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:25:11,671 WARN L233 SmtUtils]: Spent 6.92s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:25:35,582 WARN L233 SmtUtils]: Spent 21.57s on a formula simplification. DAG size of input: 214 DAG size of output: 214 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:25:44,250 WARN L233 SmtUtils]: Spent 7.39s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:26:04,543 WARN L233 SmtUtils]: Spent 18.07s on a formula simplification. DAG size of input: 203 DAG size of output: 203 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:26:11,432 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:26:29,968 WARN L233 SmtUtils]: Spent 16.18s on a formula simplification. DAG size of input: 194 DAG size of output: 193 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:26:37,218 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:26:54,159 WARN L233 SmtUtils]: Spent 14.05s on a formula simplification. DAG size of input: 186 DAG size of output: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:27:08,457 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 175 DAG size of output: 171 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:27:22,245 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 164 DAG size of output: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:27:33,529 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 154 DAG size of output: 150 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:28:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:40,614 INFO L93 Difference]: Finished difference Result 21694 states and 53690 transitions. [2022-12-14 05:28:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-14 05:28:40,616 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 05:28:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:40,643 INFO L225 Difference]: With dead ends: 21694 [2022-12-14 05:28:40,643 INFO L226 Difference]: Without dead ends: 21694 [2022-12-14 05:28:40,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 373.6s TimeCoverageRelationStatistics Valid=4079, Invalid=7477, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 05:28:40,645 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 14678 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 22110 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14678 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 22135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 22110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:40,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14678 Valid, 1518 Invalid, 22135 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 22110 Invalid, 0 Unknown, 0 Unchecked, 43.8s Time] [2022-12-14 05:28:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21694 states. [2022-12-14 05:28:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21694 to 530. [2022-12-14 05:28:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 528 states have (on average 2.4356060606060606) internal successors, (1286), 529 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1286 transitions. [2022-12-14 05:28:40,775 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1286 transitions. Word has length 24 [2022-12-14 05:28:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:40,775 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 1286 transitions. [2022-12-14 05:28:40,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1286 transitions. [2022-12-14 05:28:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 05:28:40,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:40,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:40,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 05:28:40,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 05:28:41,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 05:28:41,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:28:41,378 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 05:28:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash -691243794, now seen corresponding path program 1 times [2022-12-14 05:28:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:28:41,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890526041] [2022-12-14 05:28:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:41,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:28:41,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:28:41,382 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:28:41,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-12-14 05:28:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:41,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 05:28:41,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:42,266 INFO L321 Elim1Store]: treesize reduction 220, result has 5.6 percent of original size [2022-12-14 05:28:42,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 301 treesize of output 99 [2022-12-14 05:28:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:42,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:44,437 INFO L321 Elim1Store]: treesize reduction 565, result has 16.0 percent of original size [2022-12-14 05:28:44,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 340 treesize of output 202 [2022-12-14 05:29:20,264 WARN L233 SmtUtils]: Spent 23.51s on a formula simplification. DAG size of input: 1117 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:29:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:21,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:29:21,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890526041] [2022-12-14 05:29:21,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890526041] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:21,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [68716884] [2022-12-14 05:29:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:21,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:29:21,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:29:21,672 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:29:21,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8ed57d-ac32-49ac-9de1-05626b115f71/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 05:29:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 05:29:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:22,364 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:29:22,364 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 05:29:22,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-12-14 05:29:22,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 05:29:23,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 05:29:24,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 05:29:25,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:25,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:25,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:25,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:25,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:25,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:25,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:25,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:25,558 INFO L321 Elim1Store]: treesize reduction 220, result has 5.6 percent of original size [2022-12-14 05:29:25,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 349 treesize of output 117 [2022-12-14 05:29:25,579 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 41 treesize of output 33 [2022-12-14 05:29:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:26,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:43,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:43,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 2017 treesize of output 772 [2022-12-14 05:29:43,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:43,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,784 INFO L321 Elim1Store]: treesize reduction 354, result has 29.9 percent of original size [2022-12-14 05:29:44,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 24 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 42 case distinctions, treesize of input 2874 treesize of output 2744 [2022-12-14 05:29:44,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,452 INFO L321 Elim1Store]: treesize reduction 354, result has 29.9 percent of original size [2022-12-14 05:29:46,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 24 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 42 case distinctions, treesize of input 2535 treesize of output 1676 [2022-12-14 05:29:46,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:46,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,874 INFO L321 Elim1Store]: treesize reduction 354, result has 29.9 percent of original size [2022-12-14 05:29:47,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 24 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 42 case distinctions, treesize of input 1467 treesize of output 1142 [2022-12-14 05:29:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:47,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:48,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:48,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:48,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:49,452 INFO L321 Elim1Store]: treesize reduction 354, result has 29.9 percent of original size [2022-12-14 05:29:49,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 24 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 42 case distinctions, treesize of input 838 treesize of output 780