./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 8393723b 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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 --- 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-8393723 [2022-11-19 07:25:00,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:25:00,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:25:00,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:25:00,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:25:00,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:25:00,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:25:00,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:25:00,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:25:00,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:25:00,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:25:00,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:25:00,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:25:00,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:25:00,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:25:00,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:25:00,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:25:00,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:25:00,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:25:00,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:25:00,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:25:00,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:25:00,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:25:00,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:25:00,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:25:00,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:25:00,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:25:00,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:25:00,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:25:00,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:25:00,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:25:00,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:25:00,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:25:00,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:25:00,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:25:00,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:25:00,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:25:00,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:25:00,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:25:00,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:25:00,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:25:00,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-11-19 07:25:00,408 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:25:00,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:25:00,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:25:00,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:25:00,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:25:00,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:25:00,410 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:25:00,411 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:25:00,411 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:25:00,411 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:25:00,412 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:25:00,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:25:00,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:25:00,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:25:00,413 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:25:00,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:25:00,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:25:00,414 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:25:00,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:25:00,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:25:00,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:25:00,416 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:25:00,416 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:25:00,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:25:00,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:25:00,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:25:00,418 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:25:00,418 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:25:00,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:25:00,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:25:00,419 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:25:00,419 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:25:00,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:25:00,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:25:00,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:00,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:25:00,421 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:25:00,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:25:00,422 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:25:00,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:25:00,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:25:00,422 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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2022-11-19 07:25:00,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:25:00,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:25:00,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:25:00,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:25:00,765 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:25:00,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-19 07:25:00,846 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data/e0e22f715/2953938fef1e40878985c8af67be1f83/FLAGf72323b96 [2022-11-19 07:25:01,380 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:25:01,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-19 07:25:01,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data/e0e22f715/2953938fef1e40878985c8af67be1f83/FLAGf72323b96 [2022-11-19 07:25:01,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data/e0e22f715/2953938fef1e40878985c8af67be1f83 [2022-11-19 07:25:01,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:25:01,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:25:01,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:01,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:25:01,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:25:01,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:01" (1/1) ... [2022-11-19 07:25:01,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad83c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:01, skipping insertion in model container [2022-11-19 07:25:01,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:01" (1/1) ... [2022-11-19 07:25:01,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:25:01,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:25:01,999 WARN L234 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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-19 07:25:02,015 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-19 07:25:02,017 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-19 07:25:02,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:02,044 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-19 07:25:02,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@52624c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:02, skipping insertion in model container [2022-11-19 07:25:02,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:02,046 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:25:02,048 INFO L158 Benchmark]: Toolchain (without parser) took 318.56ms. Allocated memory is still 98.6MB. Free memory was 66.0MB in the beginning and 75.8MB in the end (delta: -9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:25:02,049 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory was 70.3MB in the beginning and 70.3MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:25:02,050 INFO L158 Benchmark]: CACSL2BoogieTranslator took 313.26ms. Allocated memory is still 98.6MB. Free memory was 66.0MB in the beginning and 75.8MB in the end (delta: -9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:25:02,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory was 70.3MB in the beginning and 70.3MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 313.26ms. Allocated memory is still 98.6MB. Free memory was 66.0MB in the beginning and 75.8MB in the end (delta: -9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: 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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 --- 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-8393723 [2022-11-19 07:25:04,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:25:04,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:25:04,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:25:04,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:25:04,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:25:04,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:25:04,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:25:04,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:25:04,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:25:04,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:25:04,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:25:04,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:25:04,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:25:04,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:25:04,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:25:04,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:25:04,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:25:04,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:25:04,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:25:04,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:25:04,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:25:04,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:25:04,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:25:04,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:25:04,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:25:04,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:25:04,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:25:04,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:25:04,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:25:04,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:25:04,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:25:04,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:25:04,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:25:04,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:25:04,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:25:04,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:25:04,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:25:04,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:25:04,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:25:04,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:25:04,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2022-11-19 07:25:04,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:25:04,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:25:04,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:25:04,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:25:04,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:25:04,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:25:04,446 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:25:04,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:25:04,446 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:25:04,446 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:25:04,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:25:04,448 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:25:04,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:25:04,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:25:04,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:25:04,450 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:25:04,450 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:25:04,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:25:04,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:25:04,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:25:04,451 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:25:04,451 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:25:04,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:25:04,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:25:04,452 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:25:04,452 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:25:04,452 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:25:04,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:25:04,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:25:04,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:25:04,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:25:04,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:04,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:25:04,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:25:04,455 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:25:04,455 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:25:04,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:25:04,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:25:04,456 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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2022-11-19 07:25:04,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:25:04,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:25:04,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:25:04,931 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:25:04,932 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:25:04,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-19 07:25:05,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data/8f5a883cd/6aad3acf6e9841b28b571e462312a817/FLAG65b6c329f [2022-11-19 07:25:05,600 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:25:05,600 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-19 07:25:05,608 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data/8f5a883cd/6aad3acf6e9841b28b571e462312a817/FLAG65b6c329f [2022-11-19 07:25:05,939 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/data/8f5a883cd/6aad3acf6e9841b28b571e462312a817 [2022-11-19 07:25:05,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:25:05,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:25:05,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:05,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:25:05,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:25:05,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:05" (1/1) ... [2022-11-19 07:25:05,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574431be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:05, skipping insertion in model container [2022-11-19 07:25:05,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:05" (1/1) ... [2022-11-19 07:25:05,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:25:05,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:25:06,113 WARN L234 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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-19 07:25:06,130 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-19 07:25:06,133 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-19 07:25:06,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:06,203 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:25:06,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:25:06,212 WARN L234 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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-19 07:25:06,218 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-19 07:25:06,221 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-19 07:25:06,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:06,247 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:25:06,259 WARN L234 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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-19 07:25:06,264 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-19 07:25:06,266 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-19 07:25:06,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:06,292 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:25:06,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06 WrapperNode [2022-11-19 07:25:06,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:06,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:06,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:25:06,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:25:06,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,335 INFO L138 Inliner]: procedures = 31, calls = 61, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-11-19 07:25:06,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:06,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:25:06,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:25:06,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:25:06,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,373 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:25:06,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:25:06,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:25:06,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:25:06,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (1/1) ... [2022-11-19 07:25:06,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:06,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:25:06,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:25:06,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:25:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:25:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:25:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:25:06,480 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-11-19 07:25:06,480 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-11-19 07:25:06,481 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-11-19 07:25:06,481 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-11-19 07:25:06,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:25:06,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:25:06,481 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:25:06,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:25:06,482 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-19 07:25:06,482 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-19 07:25:06,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:25:06,482 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-11-19 07:25:06,482 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-11-19 07:25:06,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:25:06,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:25:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:25:06,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:25:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-11-19 07:25:06,487 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-11-19 07:25:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:25:06,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:25:06,629 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:25:06,631 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:25:07,566 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:25:07,578 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:25:07,578 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:25:07,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:25:07 BoogieIcfgContainer [2022-11-19 07:25:07,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:25:07,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:25:07,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:25:07,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:25:07,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:25:05" (1/3) ... [2022-11-19 07:25:07,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@504baf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:25:07, skipping insertion in model container [2022-11-19 07:25:07,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:06" (2/3) ... [2022-11-19 07:25:07,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@504baf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:25:07, skipping insertion in model container [2022-11-19 07:25:07,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:25:07" (3/3) ... [2022-11-19 07:25:07,593 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2022-11-19 07:25:07,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:25:07,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2022-11-19 07:25:07,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:25:07,700 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;@d39e6da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:25:07,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-11-19 07:25:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 144 states have internal predecessors, (157), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:25:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:25:07,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:07,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:25:07,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:07,723 INFO L85 PathProgramCache]: Analyzing trace with hash 120433579, now seen corresponding path program 1 times [2022-11-19 07:25:07,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:07,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848502156] [2022-11-19 07:25:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:07,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:07,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:07,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:07,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:25:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:25:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:07,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:07,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:07,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848502156] [2022-11-19 07:25:07,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848502156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:07,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:07,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:25:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958275679] [2022-11-19 07:25:07,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:07,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:25:07,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:08,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:25:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:25:08,036 INFO L87 Difference]: Start difference. First operand has 174 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 144 states have internal predecessors, (157), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:08,380 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2022-11-19 07:25:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:25:08,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:25:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:08,392 INFO L225 Difference]: With dead ends: 175 [2022-11-19 07:25:08,392 INFO L226 Difference]: Without dead ends: 172 [2022-11-19 07:25:08,394 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 [2022-11-19 07:25:08,397 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:08,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 326 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:25:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-19 07:25:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2022-11-19 07:25:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 87 states have (on average 1.7011494252873562) internal successors, (148), 140 states have internal predecessors, (148), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:25:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2022-11-19 07:25:08,452 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 5 [2022-11-19 07:25:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:08,452 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2022-11-19 07:25:08,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2022-11-19 07:25:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:25:08,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:08,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:25:08,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:08,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:08,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:08,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:08,667 INFO L85 PathProgramCache]: Analyzing trace with hash 120433580, now seen corresponding path program 1 times [2022-11-19 07:25:08,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:08,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051691760] [2022-11-19 07:25:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:08,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:08,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:08,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:25:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:25:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:08,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:08,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:08,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:08,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051691760] [2022-11-19 07:25:08,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051691760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:08,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:08,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:25:08,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540190770] [2022-11-19 07:25:08,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:08,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:25:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:25:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:25:08,784 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:09,085 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2022-11-19 07:25:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:25:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:25:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:09,093 INFO L225 Difference]: With dead ends: 169 [2022-11-19 07:25:09,093 INFO L226 Difference]: Without dead ends: 169 [2022-11-19 07:25:09,093 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 [2022-11-19 07:25:09,094 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:09,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 327 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:25:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-19 07:25:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-19 07:25:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.6896551724137931) internal successors, (147), 139 states have internal predecessors, (147), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:25:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2022-11-19 07:25:09,114 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 5 [2022-11-19 07:25:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:09,115 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2022-11-19 07:25:09,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2022-11-19 07:25:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:25:09,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:09,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:09,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:09,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash 854953177, now seen corresponding path program 1 times [2022-11-19 07:25:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:09,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374771043] [2022-11-19 07:25:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:09,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:09,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:09,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:09,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:25:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:09,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:25:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:09,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:09,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:09,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374771043] [2022-11-19 07:25:09,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374771043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:09,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:09,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:25:09,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401563270] [2022-11-19 07:25:09,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:09,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:25:09,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:09,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:25:09,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:25:09,525 INFO L87 Difference]: Start difference. First operand 169 states and 191 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:25:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:09,748 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-11-19 07:25:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:25:09,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 07:25:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:09,755 INFO L225 Difference]: With dead ends: 233 [2022-11-19 07:25:09,755 INFO L226 Difference]: Without dead ends: 233 [2022-11-19 07:25:09,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:25:09,759 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 91 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:09,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1124 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:25:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-19 07:25:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 177. [2022-11-19 07:25:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 92 states have (on average 1.6521739130434783) internal successors, (152), 145 states have internal predecessors, (152), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-19 07:25:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2022-11-19 07:25:09,789 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 11 [2022-11-19 07:25:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:09,789 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2022-11-19 07:25:09,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:25:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2022-11-19 07:25:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:25:09,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:09,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:09,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:10,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:10,002 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:10,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:10,002 INFO L85 PathProgramCache]: Analyzing trace with hash 873486780, now seen corresponding path program 1 times [2022-11-19 07:25:10,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:10,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114260345] [2022-11-19 07:25:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:10,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:10,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:10,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:10,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:25:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:25:10,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:10,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:10,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:10,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:10,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114260345] [2022-11-19 07:25:10,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114260345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:10,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:10,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:25:10,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641522526] [2022-11-19 07:25:10,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:10,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:25:10,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:10,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:25:10,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:25:10,153 INFO L87 Difference]: Start difference. First operand 177 states and 201 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:25:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:10,700 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2022-11-19 07:25:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:25:10,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 07:25:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:10,703 INFO L225 Difference]: With dead ends: 181 [2022-11-19 07:25:10,703 INFO L226 Difference]: Without dead ends: 181 [2022-11-19 07:25:10,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:25:10,704 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 95 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:10,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 202 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:25:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-19 07:25:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-11-19 07:25:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 94 states have (on average 1.6595744680851063) internal successors, (156), 145 states have internal predecessors, (156), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 25 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-19 07:25:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2022-11-19 07:25:10,720 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 11 [2022-11-19 07:25:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:10,720 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2022-11-19 07:25:10,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:25:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2022-11-19 07:25:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:25:10,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:10,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:10,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:10,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:10,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:10,923 INFO L85 PathProgramCache]: Analyzing trace with hash 873486781, now seen corresponding path program 1 times [2022-11-19 07:25:10,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:10,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293124536] [2022-11-19 07:25:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:10,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:10,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:10,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:25:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:10,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:25:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:11,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:11,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:11,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293124536] [2022-11-19 07:25:11,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293124536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:11,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:11,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:25:11,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55137277] [2022-11-19 07:25:11,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:11,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:25:11,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:25:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:25:11,074 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:25:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:11,742 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2022-11-19 07:25:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:25:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 07:25:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:11,744 INFO L225 Difference]: With dead ends: 185 [2022-11-19 07:25:11,744 INFO L226 Difference]: Without dead ends: 185 [2022-11-19 07:25:11,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:25:11,746 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 100 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:11,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 177 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:25:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-19 07:25:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-11-19 07:25:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 96 states have (on average 1.6354166666666667) internal successors, (157), 147 states have internal predecessors, (157), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-11-19 07:25:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2022-11-19 07:25:11,761 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 11 [2022-11-19 07:25:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:11,761 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2022-11-19 07:25:11,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:25:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2022-11-19 07:25:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:25:11,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:11,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:11,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:11,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:11,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1280810199, now seen corresponding path program 1 times [2022-11-19 07:25:11,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:11,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282850377] [2022-11-19 07:25:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:11,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:11,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:11,977 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:11,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-19 07:25:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:12,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:25:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:12,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:12,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:12,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282850377] [2022-11-19 07:25:12,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282850377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:12,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:12,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:25:12,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109490870] [2022-11-19 07:25:12,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:12,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:25:12,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:25:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:25:12,184 INFO L87 Difference]: Start difference. First operand 182 states and 209 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:25:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:12,384 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2022-11-19 07:25:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:25:12,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-19 07:25:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:12,386 INFO L225 Difference]: With dead ends: 242 [2022-11-19 07:25:12,387 INFO L226 Difference]: Without dead ends: 242 [2022-11-19 07:25:12,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:25:12,388 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 90 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:12,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1123 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:25:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-19 07:25:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 204. [2022-11-19 07:25:12,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 110 states have (on average 1.5909090909090908) internal successors, (175), 161 states have internal predecessors, (175), 31 states have call successors, (31), 9 states have call predecessors, (31), 10 states have return successors, (35), 33 states have call predecessors, (35), 31 states have call successors, (35) [2022-11-19 07:25:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 241 transitions. [2022-11-19 07:25:12,401 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 241 transitions. Word has length 17 [2022-11-19 07:25:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:12,402 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 241 transitions. [2022-11-19 07:25:12,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:25:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 241 transitions. [2022-11-19 07:25:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:25:12,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:12,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:12,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:12,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:12,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:12,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1539264760, now seen corresponding path program 1 times [2022-11-19 07:25:12,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:12,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089594241] [2022-11-19 07:25:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:12,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:12,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:12,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 07:25:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:25:12,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:12,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:12,904 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_109 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109))))) is different from true [2022-11-19 07:25:12,967 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_109 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:13,117 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:25:13,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 07:25:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-19 07:25:13,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:13,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089594241] [2022-11-19 07:25:13,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089594241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [594080541] [2022-11-19 07:25:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:13,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:25:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:25:13,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:25:13,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 07:25:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:13,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:25:13,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:13,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:13,680 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:25:13,740 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:25:13,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:25:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-19 07:25:13,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:13,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [594080541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:13,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746419884] [2022-11-19 07:25:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:13,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:13,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:13,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:13,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:25:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:14,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:25:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:14,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:14,093 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_243 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_243) |c_#valid|)) is different from true [2022-11-19 07:25:14,226 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:25:14,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:25:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2022-11-19 07:25:14,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:14,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746419884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:14,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:14,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-11-19 07:25:14,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104654438] [2022-11-19 07:25:14,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:14,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:25:14,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:14,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:25:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=4, NotChecked=44, Total=90 [2022-11-19 07:25:14,380 INFO L87 Difference]: Start difference. First operand 204 states and 241 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-19 07:25:18,644 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_109 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_243 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_243) |c_#valid|))) is different from true [2022-11-19 07:25:18,648 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_109 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_243 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_243) |c_#valid|))))) is different from true [2022-11-19 07:25:18,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:18,986 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2022-11-19 07:25:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:25:18,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 29 [2022-11-19 07:25:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:18,988 INFO L225 Difference]: With dead ends: 210 [2022-11-19 07:25:18,988 INFO L226 Difference]: Without dead ends: 210 [2022-11-19 07:25:18,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=28, Invalid=32, Unknown=6, NotChecked=90, Total=156 [2022-11-19 07:25:18,989 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 93 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 927 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:18,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 256 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 247 Invalid, 0 Unknown, 927 Unchecked, 0.5s Time] [2022-11-19 07:25:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-19 07:25:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-11-19 07:25:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 113 states have (on average 1.584070796460177) internal successors, (179), 164 states have internal predecessors, (179), 31 states have call successors, (31), 9 states have call predecessors, (31), 11 states have return successors, (39), 34 states have call predecessors, (39), 31 states have call successors, (39) [2022-11-19 07:25:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 249 transitions. [2022-11-19 07:25:19,002 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 249 transitions. Word has length 29 [2022-11-19 07:25:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:19,003 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 249 transitions. [2022-11-19 07:25:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-19 07:25:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 249 transitions. [2022-11-19 07:25:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:25:19,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:19,005 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:19,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:19,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:19,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:19,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:19,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:19,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1070284721, now seen corresponding path program 1 times [2022-11-19 07:25:19,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:19,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308516304] [2022-11-19 07:25:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:19,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:19,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:19,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:19,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 07:25:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:25:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:19,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:19,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:19,904 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_293 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_293) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:19,946 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_293 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_293) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:20,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:20,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:25:20,031 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:25:20,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:25:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-19 07:25:20,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:20,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308516304] [2022-11-19 07:25:20,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308516304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [588612323] [2022-11-19 07:25:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:20,357 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:25:20,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:25:20,360 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:25:20,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-19 07:25:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:25:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:20,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:20,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:20,733 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_345 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_345) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:20,776 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_345 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_345) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:20,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:20,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:25:20,865 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:25:20,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:25:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-19 07:25:20,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:21,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [588612323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417040772] [2022-11-19 07:25:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:21,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:21,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:21,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:21,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:25:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:25:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:21,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:21,243 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:25:21,312 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:25:21,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:25:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 8 not checked. [2022-11-19 07:25:21,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:23,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417040772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:23,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:23,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 10 [2022-11-19 07:25:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259453316] [2022-11-19 07:25:23,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:23,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:25:23,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:25:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=53, Unknown=6, NotChecked=90, Total=182 [2022-11-19 07:25:23,543 INFO L87 Difference]: Start difference. First operand 208 states and 249 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-19 07:25:24,031 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((v_ArrVal_293 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_293) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_345 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_345) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:25:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:24,561 INFO L93 Difference]: Finished difference Result 221 states and 266 transitions. [2022-11-19 07:25:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:25:24,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2022-11-19 07:25:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:24,564 INFO L225 Difference]: With dead ends: 221 [2022-11-19 07:25:24,564 INFO L226 Difference]: Without dead ends: 221 [2022-11-19 07:25:24,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=50, Invalid=76, Unknown=8, NotChecked=138, Total=272 [2022-11-19 07:25:24,565 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 96 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1044 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:24,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 252 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 456 Invalid, 0 Unknown, 1044 Unchecked, 0.8s Time] [2022-11-19 07:25:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-19 07:25:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-11-19 07:25:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 122 states have (on average 1.540983606557377) internal successors, (188), 174 states have internal predecessors, (188), 33 states have call successors, (33), 10 states have call predecessors, (33), 13 states have return successors, (45), 36 states have call predecessors, (45), 33 states have call successors, (45) [2022-11-19 07:25:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 266 transitions. [2022-11-19 07:25:24,576 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 266 transitions. Word has length 25 [2022-11-19 07:25:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:24,577 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 266 transitions. [2022-11-19 07:25:24,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-19 07:25:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 266 transitions. [2022-11-19 07:25:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:25:24,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:24,578 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:24,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:24,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:25,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:25,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:25,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:25,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1668050227, now seen corresponding path program 1 times [2022-11-19 07:25:25,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:25,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525972708] [2022-11-19 07:25:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:25,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:25,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:25,195 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:25,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 07:25:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:25,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:25:25,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:25,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:25,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:25,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:25,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525972708] [2022-11-19 07:25:25,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525972708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:25,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1398590224] [2022-11-19 07:25:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:25,654 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:25:25,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:25:25,656 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:25:25,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-19 07:25:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:25,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:25:25,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:25,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:25,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:26,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1398590224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14875770] [2022-11-19 07:25:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:26,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:26,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:26,180 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:26,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:25:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:25:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:26,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:26,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14875770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:26,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:25:26,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2022-11-19 07:25:26,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64816150] [2022-11-19 07:25:26,472 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:26,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:25:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:25:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:25:26,473 INFO L87 Difference]: Start difference. First operand 221 states and 266 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:25:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:27,471 INFO L93 Difference]: Finished difference Result 244 states and 293 transitions. [2022-11-19 07:25:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:25:27,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 25 [2022-11-19 07:25:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:27,474 INFO L225 Difference]: With dead ends: 244 [2022-11-19 07:25:27,474 INFO L226 Difference]: Without dead ends: 244 [2022-11-19 07:25:27,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:25:27,475 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 64 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:27,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1034 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 565 Invalid, 0 Unknown, 167 Unchecked, 0.9s Time] [2022-11-19 07:25:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-19 07:25:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 236. [2022-11-19 07:25:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.525925925925926) internal successors, (206), 185 states have internal predecessors, (206), 35 states have call successors, (35), 12 states have call predecessors, (35), 15 states have return successors, (47), 38 states have call predecessors, (47), 35 states have call successors, (47) [2022-11-19 07:25:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 288 transitions. [2022-11-19 07:25:27,494 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 288 transitions. Word has length 25 [2022-11-19 07:25:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:27,495 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 288 transitions. [2022-11-19 07:25:27,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:25:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 288 transitions. [2022-11-19 07:25:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:25:27,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:27,496 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:27,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:27,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:27,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:28,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:28,109 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:28,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1668050226, now seen corresponding path program 1 times [2022-11-19 07:25:28,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:28,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992148525] [2022-11-19 07:25:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:28,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:28,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:28,111 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:28,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 07:25:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:25:28,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:28,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:28,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:29,613 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992148525] [2022-11-19 07:25:29,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992148525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1799467585] [2022-11-19 07:25:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:29,614 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:25:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:25:29,616 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:25:29,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-19 07:25:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:29,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:25:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:29,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:29,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:30,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1799467585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497767622] [2022-11-19 07:25:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:30,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:30,912 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:30,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:25:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:25:31,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:31,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:31,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:25:32,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497767622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:32,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:25:32,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2022-11-19 07:25:32,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609973144] [2022-11-19 07:25:32,242 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:32,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:25:32,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:32,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:25:32,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:25:32,243 INFO L87 Difference]: Start difference. First operand 236 states and 288 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:25:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:37,280 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2022-11-19 07:25:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:25:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2022-11-19 07:25:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:37,283 INFO L225 Difference]: With dead ends: 261 [2022-11-19 07:25:37,283 INFO L226 Difference]: Without dead ends: 261 [2022-11-19 07:25:37,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:25:37,285 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 164 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:37,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 605 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1401 Invalid, 0 Unknown, 47 Unchecked, 4.7s Time] [2022-11-19 07:25:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-19 07:25:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 252. [2022-11-19 07:25:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 147 states have (on average 1.5034013605442176) internal successors, (221), 197 states have internal predecessors, (221), 38 states have call successors, (38), 13 states have call predecessors, (38), 16 states have return successors, (50), 41 states have call predecessors, (50), 38 states have call successors, (50) [2022-11-19 07:25:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 309 transitions. [2022-11-19 07:25:37,297 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 309 transitions. Word has length 25 [2022-11-19 07:25:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:37,297 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 309 transitions. [2022-11-19 07:25:37,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:25:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 309 transitions. [2022-11-19 07:25:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:25:37,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:37,299 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:37,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:37,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:37,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:37,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:37,911 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1600428672, now seen corresponding path program 1 times [2022-11-19 07:25:37,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:37,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396754158] [2022-11-19 07:25:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:37,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:37,913 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:37,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 07:25:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:25:38,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:38,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:38,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:38,302 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_676 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_676) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:38,339 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_676 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_676) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:38,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:25:38,413 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:25:38,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:25:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 13 not checked. [2022-11-19 07:25:38,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:38,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396754158] [2022-11-19 07:25:38,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396754158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1841976483] [2022-11-19 07:25:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:38,844 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:25:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:25:38,845 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:25:38,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-19 07:25:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:39,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:25:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:39,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:39,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:39,386 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_774 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_774) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:39,421 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_774 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_774) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:39,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:39,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:25:39,498 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:25:39,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:25:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 13 not checked. [2022-11-19 07:25:39,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:42,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1841976483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:42,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547240180] [2022-11-19 07:25:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:42,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:42,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:42,215 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:42,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:25:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:25:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:42,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:42,445 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:25:42,507 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:25:42,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:25:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 13 not checked. [2022-11-19 07:25:42,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:47,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547240180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:47,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:47,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 10 [2022-11-19 07:25:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583205985] [2022-11-19 07:25:47,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:47,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:25:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:25:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=99, Unknown=7, NotChecked=120, Total=272 [2022-11-19 07:25:47,161 INFO L87 Difference]: Start difference. First operand 252 states and 309 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:25:47,321 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_774 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_774) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_676 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_676) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:25:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:48,065 INFO L93 Difference]: Finished difference Result 281 states and 351 transitions. [2022-11-19 07:25:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:25:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 45 [2022-11-19 07:25:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:48,068 INFO L225 Difference]: With dead ends: 281 [2022-11-19 07:25:48,068 INFO L226 Difference]: Without dead ends: 281 [2022-11-19 07:25:48,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=67, Invalid=130, Unknown=9, NotChecked=174, Total=380 [2022-11-19 07:25:48,069 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 94 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1022 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:48,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 213 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 316 Invalid, 0 Unknown, 1022 Unchecked, 0.7s Time] [2022-11-19 07:25:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-19 07:25:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-11-19 07:25:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 167 states have (on average 1.4550898203592815) internal successors, (243), 219 states have internal predecessors, (243), 43 states have call successors, (43), 15 states have call predecessors, (43), 20 states have return successors, (65), 46 states have call predecessors, (65), 43 states have call successors, (65) [2022-11-19 07:25:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 351 transitions. [2022-11-19 07:25:48,094 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 351 transitions. Word has length 45 [2022-11-19 07:25:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:48,094 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 351 transitions. [2022-11-19 07:25:48,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:25:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 351 transitions. [2022-11-19 07:25:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:25:48,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:48,096 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] [2022-11-19 07:25:48,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:48,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:48,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:25:48,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:48,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting tree_inorderErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:48,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash 369889479, now seen corresponding path program 1 times [2022-11-19 07:25:48,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:48,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422697633] [2022-11-19 07:25:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:48,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:48,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:48,714 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:48,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 07:25:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:25:48,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:48,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:48,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422697633] [2022-11-19 07:25:48,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422697633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:48,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:48,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:25:48,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139651729] [2022-11-19 07:25:48,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:48,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:25:48,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:48,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:25:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:25:48,868 INFO L87 Difference]: Start difference. First operand 281 states and 351 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:25:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:48,903 INFO L93 Difference]: Finished difference Result 271 states and 332 transitions. [2022-11-19 07:25:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:25:48,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-19 07:25:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:48,906 INFO L225 Difference]: With dead ends: 271 [2022-11-19 07:25:48,906 INFO L226 Difference]: Without dead ends: 253 [2022-11-19 07:25:48,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:25:48,907 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 0 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:48,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 744 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:25:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-19 07:25:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-11-19 07:25:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 149 states have (on average 1.476510067114094) internal successors, (220), 201 states have internal predecessors, (220), 35 states have call successors, (35), 13 states have call predecessors, (35), 18 states have return successors, (59), 38 states have call predecessors, (59), 35 states have call successors, (59) [2022-11-19 07:25:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 314 transitions. [2022-11-19 07:25:48,919 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 314 transitions. Word has length 30 [2022-11-19 07:25:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:48,919 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 314 transitions. [2022-11-19 07:25:48,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:25:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 314 transitions. [2022-11-19 07:25:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:25:48,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:48,921 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:48,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:49,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:49,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:49,133 INFO L85 PathProgramCache]: Analyzing trace with hash -648076771, now seen corresponding path program 1 times [2022-11-19 07:25:49,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:49,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363129600] [2022-11-19 07:25:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:49,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:49,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:49,135 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:49,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:25:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:49,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:25:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:49,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:49,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:49,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363129600] [2022-11-19 07:25:49,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363129600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:49,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:49,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:25:49,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124334671] [2022-11-19 07:25:49,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:49,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:25:49,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:49,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:25:49,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:25:49,356 INFO L87 Difference]: Start difference. First operand 253 states and 314 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:25:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:49,779 INFO L93 Difference]: Finished difference Result 259 states and 323 transitions. [2022-11-19 07:25:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:25:49,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-11-19 07:25:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:49,781 INFO L225 Difference]: With dead ends: 259 [2022-11-19 07:25:49,781 INFO L226 Difference]: Without dead ends: 255 [2022-11-19 07:25:49,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:25:49,782 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 109 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:49,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1017 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:25:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-19 07:25:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2022-11-19 07:25:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 149 states have (on average 1.4630872483221478) internal successors, (218), 201 states have internal predecessors, (218), 35 states have call successors, (35), 13 states have call predecessors, (35), 18 states have return successors, (59), 38 states have call predecessors, (59), 35 states have call successors, (59) [2022-11-19 07:25:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 312 transitions. [2022-11-19 07:25:49,793 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 312 transitions. Word has length 31 [2022-11-19 07:25:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:49,793 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 312 transitions. [2022-11-19 07:25:49,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:25:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 312 transitions. [2022-11-19 07:25:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:25:49,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:49,794 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:49,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:49,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:49,995 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:49,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2088825952, now seen corresponding path program 1 times [2022-11-19 07:25:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:49,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952258861] [2022-11-19 07:25:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:49,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:49,997 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:50,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-19 07:25:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:50,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 07:25:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:50,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:25:50,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:25:50,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:25:50,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:25:50,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:25:50,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:25:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:50,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:52,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:25:52,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952258861] [2022-11-19 07:25:52,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952258861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:52,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1921059264] [2022-11-19 07:25:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:52,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:25:52,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:25:52,384 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:25:52,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-19 07:25:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 07:25:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:52,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:25:52,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:25:52,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:25:52,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:25:52,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:25:52,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:25:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:52,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:54,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1921059264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:54,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238159004] [2022-11-19 07:25:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:54,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:54,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:54,034 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:54,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:25:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 07:25:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:54,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:25:54,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:25:54,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:25:54,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:25:54,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:25:54,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:25:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:54,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:55,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238159004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:55,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:25:55,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 14] total 23 [2022-11-19 07:25:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410061568] [2022-11-19 07:25:55,464 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:55,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:25:55,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:25:55,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:25:55,466 INFO L87 Difference]: Start difference. First operand 253 states and 312 transitions. Second operand has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:25:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:58,812 INFO L93 Difference]: Finished difference Result 283 states and 354 transitions. [2022-11-19 07:25:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:25:58,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-11-19 07:25:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:58,815 INFO L225 Difference]: With dead ends: 283 [2022-11-19 07:25:58,815 INFO L226 Difference]: Without dead ends: 283 [2022-11-19 07:25:58,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:25:58,816 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 164 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1985 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:58,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1985 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1437 Invalid, 0 Unknown, 38 Unchecked, 2.8s Time] [2022-11-19 07:25:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-19 07:25:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 257. [2022-11-19 07:25:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 152 states have (on average 1.4539473684210527) internal successors, (221), 204 states have internal predecessors, (221), 35 states have call successors, (35), 14 states have call predecessors, (35), 19 states have return successors, (59), 38 states have call predecessors, (59), 35 states have call successors, (59) [2022-11-19 07:25:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 315 transitions. [2022-11-19 07:25:58,827 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 315 transitions. Word has length 31 [2022-11-19 07:25:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:58,827 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 315 transitions. [2022-11-19 07:25:58,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:25:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 315 transitions. [2022-11-19 07:25:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:25:58,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:58,828 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:58,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:59,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:59,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:59,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:25:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash -931523584, now seen corresponding path program 2 times [2022-11-19 07:25:59,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:59,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960005659] [2022-11-19 07:25:59,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:25:59,438 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 [2022-11-19 07:25:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:59,439 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:59,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 07:25:59,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:25:59,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:25:59,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:25:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:59,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:25:59,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:59,904 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1150 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1150))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:25:59,949 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1150 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1150)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:00,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:26:00,049 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:26:00,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:26:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 13 not checked. [2022-11-19 07:26:00,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:00,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960005659] [2022-11-19 07:26:00,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960005659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1583903793] [2022-11-19 07:26:00,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:00,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:00,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:00,435 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:00,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-19 07:26:00,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:00,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:00,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:26:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:00,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:26:00,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:26:01,027 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1248 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1248) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:01,064 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1248 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1248) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:01,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:01,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:26:01,154 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:26:01,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:26:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 13 not checked. [2022-11-19 07:26:01,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:03,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1583903793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:03,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276291760] [2022-11-19 07:26:03,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:03,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:03,359 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:03,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 07:26:03,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:03,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:03,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:26:03,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:03,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:26:03,655 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:26:03,729 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:26:03,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:26:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 13 not checked. [2022-11-19 07:26:03,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:03,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276291760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:03,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:26:03,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 10 [2022-11-19 07:26:03,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954128677] [2022-11-19 07:26:03,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:03,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:26:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:26:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=54, Unknown=5, NotChecked=90, Total=182 [2022-11-19 07:26:03,988 INFO L87 Difference]: Start difference. First operand 257 states and 315 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 8 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:26:04,097 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((v_ArrVal_1248 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1248) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1150 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1150)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:26:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:04,747 INFO L93 Difference]: Finished difference Result 262 states and 330 transitions. [2022-11-19 07:26:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:26:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 8 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 45 [2022-11-19 07:26:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:04,749 INFO L225 Difference]: With dead ends: 262 [2022-11-19 07:26:04,749 INFO L226 Difference]: Without dead ends: 262 [2022-11-19 07:26:04,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=42, Invalid=66, Unknown=6, NotChecked=126, Total=240 [2022-11-19 07:26:04,750 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 178 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 979 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:04,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 178 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 278 Invalid, 0 Unknown, 979 Unchecked, 0.6s Time] [2022-11-19 07:26:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-19 07:26:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2022-11-19 07:26:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 153 states have (on average 1.457516339869281) internal successors, (223), 204 states have internal predecessors, (223), 35 states have call successors, (35), 14 states have call predecessors, (35), 19 states have return successors, (59), 39 states have call predecessors, (59), 35 states have call successors, (59) [2022-11-19 07:26:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 317 transitions. [2022-11-19 07:26:04,762 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 317 transitions. Word has length 45 [2022-11-19 07:26:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:04,762 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 317 transitions. [2022-11-19 07:26:04,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 8 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:26:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 317 transitions. [2022-11-19 07:26:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:26:04,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:04,763 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:04,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:04,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:05,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-19 07:26:05,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:05,371 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:26:05,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:05,371 INFO L85 PathProgramCache]: Analyzing trace with hash 372322017, now seen corresponding path program 1 times [2022-11-19 07:26:05,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:05,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138578168] [2022-11-19 07:26:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:05,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:05,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:05,373 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:05,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:26:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:05,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:26:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:05,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:26:05,618 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1400 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1400))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:05,646 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1400 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1400)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:05,728 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:26:05,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 07:26:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 13 not checked. [2022-11-19 07:26:05,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:05,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138578168] [2022-11-19 07:26:05,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138578168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1613493731] [2022-11-19 07:26:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:05,886 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:05,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:05,887 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:05,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-19 07:26:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:06,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:26:06,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:06,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:26:06,266 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:26:06,330 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:26:06,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:26:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 13 not checked. [2022-11-19 07:26:06,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:06,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1613493731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:06,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45361103] [2022-11-19 07:26:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:06,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:06,492 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:06,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 07:26:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:26:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:06,710 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1511 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1511))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:06,745 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1511 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1511)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:06,833 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:26:06,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 07:26:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 7 not checked. [2022-11-19 07:26:06,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:06,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45361103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:06,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:26:06,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-11-19 07:26:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509706962] [2022-11-19 07:26:06,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:06,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:26:06,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:26:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=17, Unknown=5, NotChecked=50, Total=90 [2022-11-19 07:26:06,975 INFO L87 Difference]: Start difference. First operand 258 states and 317 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 07:26:09,057 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1511 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1511)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1400 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1400)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:26:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:09,599 INFO L93 Difference]: Finished difference Result 263 states and 331 transitions. [2022-11-19 07:26:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:26:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) Word has length 31 [2022-11-19 07:26:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:09,601 INFO L225 Difference]: With dead ends: 263 [2022-11-19 07:26:09,602 INFO L226 Difference]: Without dead ends: 263 [2022-11-19 07:26:09,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=24, Invalid=24, Unknown=6, NotChecked=78, Total=132 [2022-11-19 07:26:09,602 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 90 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 988 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:09,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 207 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 243 Invalid, 0 Unknown, 988 Unchecked, 0.5s Time] [2022-11-19 07:26:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-19 07:26:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 255. [2022-11-19 07:26:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 151 states have (on average 1.4569536423841059) internal successors, (220), 202 states have internal predecessors, (220), 35 states have call successors, (35), 14 states have call predecessors, (35), 18 states have return successors, (58), 38 states have call predecessors, (58), 35 states have call successors, (58) [2022-11-19 07:26:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 313 transitions. [2022-11-19 07:26:09,612 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 313 transitions. Word has length 31 [2022-11-19 07:26:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:09,612 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 313 transitions. [2022-11-19 07:26:09,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 07:26:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 313 transitions. [2022-11-19 07:26:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:26:09,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:09,614 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 07:26:09,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:09,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:10,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:26:10,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:10,218 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:26:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -286572548, now seen corresponding path program 2 times [2022-11-19 07:26:10,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:10,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846364658] [2022-11-19 07:26:10,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:10,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:10,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:10,220 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:10,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-19 07:26:10,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:10,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:26:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:10,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:26:10,565 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_1608 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1608) |c_#valid|)))) is different from true [2022-11-19 07:26:10,592 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:26:10,778 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-19 07:26:10,778 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-19 07:26:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 23 not checked. [2022-11-19 07:26:10,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:12,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:12,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846364658] [2022-11-19 07:26:12,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846364658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:12,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [130896209] [2022-11-19 07:26:12,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:12,924 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:12,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:12,925 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:12,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-19 07:26:13,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:26:13,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828554663] [2022-11-19 07:26:13,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:13,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:13,346 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:13,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 1 [2022-11-19 07:26:13,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 07:26:13,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:13,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:26:13,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:13,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:26:13,737 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1799 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1799) |c_#valid|)) is different from true [2022-11-19 07:26:13,752 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1800 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1800))) is different from true [2022-11-19 07:26:22,074 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_115 (_ BitVec 32)) (v_ArrVal_1799 (_ BitVec 1))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1799) v_nondet_tree_~n~0.base_115 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= .cse0 |c_#valid|)))) is different from true [2022-11-19 07:26:22,141 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-19 07:26:22,141 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 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-19 07:26:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 8 refuted. 1 times theorem prover too weak. 17 trivial. 21 not checked. [2022-11-19 07:26:22,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:22,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828554663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:22,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:26:22,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2022-11-19 07:26:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927183648] [2022-11-19 07:26:22,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:22,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:26:22,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:22,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:26:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=64, Unknown=11, NotChecked=100, Total=210 [2022-11-19 07:26:22,416 INFO L87 Difference]: Start difference. First operand 255 states and 313 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 9 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-19 07:26:26,534 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1800 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1800))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-19 07:26:30,597 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_1800 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1800) |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_115 (_ BitVec 32)) (v_ArrVal_1799 (_ BitVec 1))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1799) v_nondet_tree_~n~0.base_115 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= .cse0 |c_#valid|))))) is different from true [2022-11-19 07:26:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:33,261 INFO L93 Difference]: Finished difference Result 263 states and 331 transitions. [2022-11-19 07:26:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:26:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 9 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 43 [2022-11-19 07:26:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:33,264 INFO L225 Difference]: With dead ends: 263 [2022-11-19 07:26:33,264 INFO L226 Difference]: Without dead ends: 263 [2022-11-19 07:26:33,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=57, Invalid=88, Unknown=15, NotChecked=182, Total=342 [2022-11-19 07:26:33,265 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 92 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1554 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:33,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 425 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 235 Invalid, 0 Unknown, 1554 Unchecked, 0.5s Time] [2022-11-19 07:26:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-19 07:26:33,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-11-19 07:26:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 155 states have (on average 1.4516129032258065) internal successors, (225), 205 states have internal predecessors, (225), 35 states have call successors, (35), 14 states have call predecessors, (35), 19 states have return successors, (69), 40 states have call predecessors, (69), 35 states have call successors, (69) [2022-11-19 07:26:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 329 transitions. [2022-11-19 07:26:33,278 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 329 transitions. Word has length 43 [2022-11-19 07:26:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:33,280 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 329 transitions. [2022-11-19 07:26:33,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 9 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-19 07:26:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 329 transitions. [2022-11-19 07:26:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:26:33,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:33,283 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2022-11-19 07:26:33,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:33,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-19 07:26:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:33,699 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:26:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1005226935, now seen corresponding path program 2 times [2022-11-19 07:26:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582907359] [2022-11-19 07:26:33,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:33,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:33,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:33,702 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:33,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:26:34,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:34,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:34,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:26:34,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:34,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:26:34,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:26:34,317 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_1956 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1956) |c_#length|)))) is different from true [2022-11-19 07:26:34,352 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:26:34,415 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1956 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_126 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1956) v_nondet_tree_~n~0.base_126 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:34,530 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:26:34,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:26:34,553 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:26:34,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:26:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 105 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 30 not checked. [2022-11-19 07:26:34,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:34,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582907359] [2022-11-19 07:26:34,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582907359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792582845] [2022-11-19 07:26:34,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:34,946 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:34,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:34,948 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:34,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-19 07:26:35,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:35,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:26:35,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:35,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:26:35,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:26:35,713 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_2108 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2108) |c_#length|)))) is different from true [2022-11-19 07:26:35,802 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2108 (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_137)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_137 v_ArrVal_2108) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:26:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:35,937 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:26:35,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:26:35,961 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:26:35,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:26:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 105 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 30 not checked. [2022-11-19 07:26:35,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:38,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792582845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:38,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383746619] [2022-11-19 07:26:38,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:38,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:38,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:38,977 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 07:26:39,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:39,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:39,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:26:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:39,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:26:39,464 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_148 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_148 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:26:39,557 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-19 07:26:39,558 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 2 case distinctions, treesize of input 15 treesize of output 19 [2022-11-19 07:26:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 27 not checked. [2022-11-19 07:26:39,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:41,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383746619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:41,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:26:41,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 11 [2022-11-19 07:26:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218993251] [2022-11-19 07:26:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:26:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:26:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=54, Unknown=7, NotChecked=114, Total=210 [2022-11-19 07:26:41,943 INFO L87 Difference]: Start difference. First operand 260 states and 329 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (13), 6 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-19 07:26:42,682 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2108 (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_137)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_137 v_ArrVal_2108) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_1956 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_126 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1956) v_nondet_tree_~n~0.base_126 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_nondet_tree_~n~0.base_148 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_148 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:26:43,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:43,005 INFO L93 Difference]: Finished difference Result 269 states and 340 transitions. [2022-11-19 07:26:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:26:43,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (13), 6 states have call predecessors, (13), 9 states have call successors, (13) Word has length 67 [2022-11-19 07:26:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:43,007 INFO L225 Difference]: With dead ends: 269 [2022-11-19 07:26:43,007 INFO L226 Difference]: Without dead ends: 269 [2022-11-19 07:26:43,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=52, Invalid=77, Unknown=9, NotChecked=168, Total=306 [2022-11-19 07:26:43,008 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 94 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1259 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:43,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 261 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 446 Invalid, 0 Unknown, 1259 Unchecked, 0.9s Time] [2022-11-19 07:26:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-19 07:26:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2022-11-19 07:26:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 160 states have (on average 1.43125) internal successors, (229), 210 states have internal predecessors, (229), 36 states have call successors, (36), 14 states have call predecessors, (36), 20 states have return successors, (73), 42 states have call predecessors, (73), 36 states have call successors, (73) [2022-11-19 07:26:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 338 transitions. [2022-11-19 07:26:43,019 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 338 transitions. Word has length 67 [2022-11-19 07:26:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:43,019 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 338 transitions. [2022-11-19 07:26:43,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (13), 6 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-19 07:26:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 338 transitions. [2022-11-19 07:26:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:26:43,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:43,021 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:43,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-19 07:26:43,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:43,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:26:43,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:43,628 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:26:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:43,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2047148606, now seen corresponding path program 2 times [2022-11-19 07:26:43,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:43,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156676966] [2022-11-19 07:26:43,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:43,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:43,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:43,630 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:43,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:26:43,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:43,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:43,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:26:43,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:44,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:45,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-19 07:26:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:45,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156676966] [2022-11-19 07:26:45,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156676966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1119006202] [2022-11-19 07:26:45,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:45,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:45,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:45,307 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:45,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-19 07:26:45,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:45,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:45,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:26:45,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:26:46,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:46,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-19 07:26:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:26:46,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1119006202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:46,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258655773] [2022-11-19 07:26:46,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:46,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:46,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:46,640 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:46,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 07:26:46,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:46,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:46,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:26:46,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:47,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:47,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-19 07:26:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:26:47,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258655773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:47,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:26:47,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 9, 9] total 24 [2022-11-19 07:26:47,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307609191] [2022-11-19 07:26:47,590 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:47,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:26:47,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:26:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:26:47,591 INFO L87 Difference]: Start difference. First operand 267 states and 338 transitions. Second operand has 25 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 07:26:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:51,074 INFO L93 Difference]: Finished difference Result 276 states and 348 transitions. [2022-11-19 07:26:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:26:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) Word has length 39 [2022-11-19 07:26:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:51,076 INFO L225 Difference]: With dead ends: 276 [2022-11-19 07:26:51,076 INFO L226 Difference]: Without dead ends: 276 [2022-11-19 07:26:51,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:26:51,076 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 82 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:51,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1954 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 832 Invalid, 0 Unknown, 153 Unchecked, 3.2s Time] [2022-11-19 07:26:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-19 07:26:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2022-11-19 07:26:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 162 states have (on average 1.4135802469135803) internal successors, (229), 212 states have internal predecessors, (229), 36 states have call successors, (36), 15 states have call predecessors, (36), 21 states have return successors, (73), 42 states have call predecessors, (73), 36 states have call successors, (73) [2022-11-19 07:26:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 338 transitions. [2022-11-19 07:26:51,087 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 338 transitions. Word has length 39 [2022-11-19 07:26:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:51,087 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 338 transitions. [2022-11-19 07:26:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 07:26:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 338 transitions. [2022-11-19 07:26:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:26:51,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:51,089 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 07:26:51,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:51,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-19 07:26:51,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:51,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:51,702 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:26:51,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:51,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1831948676, now seen corresponding path program 3 times [2022-11-19 07:26:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:51,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357922250] [2022-11-19 07:26:51,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:26:51,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:51,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:51,704 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:51,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:26:52,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:26:52,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:52,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:26:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:52,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:26:52,200 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2530 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2530))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:52,233 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2530 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2530)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:26:52,256 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2531 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2531))) is different from true [2022-11-19 07:26:54,499 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-19 07:26:54,500 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-19 07:26:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 11 not checked. [2022-11-19 07:26:54,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:55,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357922250] [2022-11-19 07:26:55,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357922250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2122495074] [2022-11-19 07:26:55,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:26:55,514 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:55,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:55,516 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:55,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-19 07:26:56,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:26:56,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:26:56,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:56,149 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2629 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2629) |c_#valid|)) is different from true [2022-11-19 07:26:56,175 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2630 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2630) |c_#valid|)) is different from true [2022-11-19 07:26:56,212 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:26:56,240 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2629 (_ BitVec 1)) (v_nondet_tree_~n~0.base_203 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2629) v_nondet_tree_~n~0.base_203 (_ bv1 1)))) is different from true [2022-11-19 07:26:58,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:26:58,356 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-19 07:26:58,356 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-19 07:26:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 20 not checked. [2022-11-19 07:26:58,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:58,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2122495074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:58,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460718038] [2022-11-19 07:26:58,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:26:58,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:58,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:58,686 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:58,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-19 07:27:01,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:27:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:27:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:01,049 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2733 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2733) |c_#valid|)) is different from true [2022-11-19 07:27:01,074 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2734 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2734) |c_#valid|)) is different from true [2022-11-19 07:27:04,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:04,106 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-19 07:27:04,106 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-19 07:27:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 12 not checked. [2022-11-19 07:27:04,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:04,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460718038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:04,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:04,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 16 [2022-11-19 07:27:04,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657223226] [2022-11-19 07:27:04,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:04,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:27:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:27:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:27:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=77, Unknown=12, NotChecked=234, Total=380 [2022-11-19 07:27:04,422 INFO L87 Difference]: Start difference. First operand 270 states and 338 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-19 07:27:11,206 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_2531 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2531) |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_2530 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2530)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2629 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2629) |c_#valid|)) (exists ((v_ArrVal_2733 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2733) |c_#valid|)) (exists ((v_ArrVal_2734 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2734) |c_#valid|))) is different from true [2022-11-19 07:27:15,700 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_2531 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2531) |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-19 07:27:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:20,389 INFO L93 Difference]: Finished difference Result 281 states and 365 transitions. [2022-11-19 07:27:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:27:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 43 [2022-11-19 07:27:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:20,391 INFO L225 Difference]: With dead ends: 281 [2022-11-19 07:27:20,391 INFO L226 Difference]: Without dead ends: 281 [2022-11-19 07:27:20,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 114 SyntacticMatches, 20 SemanticMatches, 23 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=16, NotChecked=374, Total=600 [2022-11-19 07:27:20,392 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 99 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2146 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:20,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 319 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 252 Invalid, 0 Unknown, 2146 Unchecked, 0.5s Time] [2022-11-19 07:27:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-19 07:27:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2022-11-19 07:27:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 165 states have (on average 1.412121212121212) internal successors, (233), 215 states have internal predecessors, (233), 36 states have call successors, (36), 15 states have call predecessors, (36), 22 states have return successors, (85), 43 states have call predecessors, (85), 36 states have call successors, (85) [2022-11-19 07:27:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 354 transitions. [2022-11-19 07:27:20,404 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 354 transitions. Word has length 43 [2022-11-19 07:27:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:20,404 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 354 transitions. [2022-11-19 07:27:20,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-19 07:27:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 354 transitions. [2022-11-19 07:27:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:27:20,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:20,405 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 07:27:20,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:20,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:20,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:21,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:21,011 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:27:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1831948675, now seen corresponding path program 3 times [2022-11-19 07:27:21,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:27:21,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881403250] [2022-11-19 07:27:21,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:21,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:27:21,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:27:21,014 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:27:21,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 07:27:21,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:27:21,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:27:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:21,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:27:21,653 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:21,752 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:27:21,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:27:21,763 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_231 (_ BitVec 32))) (and (= (store (store |c_old(#length)| c_nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_231 (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_231 c_nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:21,786 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_231 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| |nondet_tree_#res.base| (_ bv12 32)) v_nondet_tree_~n~0.base_231 (_ bv12 32))) (not (= v_nondet_tree_~n~0.base_231 |nondet_tree_#res.base|)))) is different from true [2022-11-19 07:27:21,838 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-19 07:27:21,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-19 07:27:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 26 not checked. [2022-11-19 07:27:21,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:22,182 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:27:22,182 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 15 treesize of output 14 [2022-11-19 07:27:22,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:27:22,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881403250] [2022-11-19 07:27:22,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881403250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:22,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1929871650] [2022-11-19 07:27:22,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:22,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:27:22,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:27:22,339 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:27:22,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-19 07:27:23,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:27:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:27:23,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:23,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:27:23,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:27:23,470 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2936 (_ BitVec 32)) (v_ArrVal_2938 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret9.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2936) |c_nondet_tree_#t~ret9.base| v_ArrVal_2938) |c_#length|))) is different from true [2022-11-19 07:27:23,498 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2936 (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_2938 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2936) |nondet_tree_#t~ret9.base| v_ArrVal_2938) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:23,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:23,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:23,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-19 07:27:23,565 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-19 07:27:23,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:27:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 26 refuted. 4 times theorem prover too weak. 7 trivial. 10 not checked. [2022-11-19 07:27:23,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:24,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1929871650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023627538] [2022-11-19 07:27:24,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:24,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:24,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:24,082 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:24,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-19 07:27:26,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:27:26,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:26,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:27:26,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:26,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:27:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:26,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-19 07:27:26,977 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-19 07:27:26,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:27:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 20 not checked. [2022-11-19 07:27:27,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:29,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023627538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:29,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:29,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-11-19 07:27:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263093409] [2022-11-19 07:27:29,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:29,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:27:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:27:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:27:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=358, Unknown=7, NotChecked=210, Total=650 [2022-11-19 07:27:29,613 INFO L87 Difference]: Start difference. First operand 274 states and 354 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-19 07:27:30,767 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_251 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_251 (_ bv1 1)) nondet_tree_~n~0.base) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_251)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_251 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((v_nondet_tree_~n~0.base_231 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| |nondet_tree_#res.base| (_ bv12 32)) v_nondet_tree_~n~0.base_231 (_ bv12 32))) (not (= v_nondet_tree_~n~0.base_231 |nondet_tree_#res.base|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2936 (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_2938 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2936) |nondet_tree_#t~ret9.base| v_ArrVal_2938) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:27:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:31,460 INFO L93 Difference]: Finished difference Result 276 states and 355 transitions. [2022-11-19 07:27:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:27:31,461 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) Word has length 43 [2022-11-19 07:27:31,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:31,462 INFO L225 Difference]: With dead ends: 276 [2022-11-19 07:27:31,462 INFO L226 Difference]: Without dead ends: 276 [2022-11-19 07:27:31,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=118, Invalid=599, Unknown=9, NotChecked=330, Total=1056 [2022-11-19 07:27:31,463 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 177 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1582 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:31,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 392 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 408 Invalid, 0 Unknown, 1582 Unchecked, 0.9s Time] [2022-11-19 07:27:31,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-19 07:27:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2022-11-19 07:27:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 164 states have (on average 1.4085365853658536) internal successors, (231), 215 states have internal predecessors, (231), 36 states have call successors, (36), 15 states have call predecessors, (36), 22 states have return successors, (85), 42 states have call predecessors, (85), 36 states have call successors, (85) [2022-11-19 07:27:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 352 transitions. [2022-11-19 07:27:31,477 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 352 transitions. Word has length 43 [2022-11-19 07:27:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:31,477 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 352 transitions. [2022-11-19 07:27:31,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-19 07:27:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 352 transitions. [2022-11-19 07:27:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 07:27:31,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:31,484 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 07:27:31,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:31,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:31,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:32,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:32,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:27:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash -396519222, now seen corresponding path program 3 times [2022-11-19 07:27:32,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:27:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283690198] [2022-11-19 07:27:32,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:32,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:27:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:27:32,093 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:27:32,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 07:27:32,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 07:27:32,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:27:32,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:32,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:27:32,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:27:32,823 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3162 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3162) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:32,869 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3162 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3162) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:32,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:32,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:27:32,958 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:27:32,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:27:33,009 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3163 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3163) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:33,041 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3163 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3163) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:33,066 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:27:33,126 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_263 (_ BitVec 32)) (v_ArrVal_3163 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3163) v_nondet_tree_~n~0.base_263 (_ bv12 32))))) is different from true [2022-11-19 07:27:33,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:33,197 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:27:33,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:27:33,212 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:27:33,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:27:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 81 not checked. [2022-11-19 07:27:33,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:35,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:27:35,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283690198] [2022-11-19 07:27:35,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283690198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:35,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1071246052] [2022-11-19 07:27:35,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:35,574 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:27:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:27:35,575 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:27:35,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-19 07:27:36,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:27:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697438996] [2022-11-19 07:27:36,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:36,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:36,299 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:36,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-19 07:27:36,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 1 [2022-11-19 07:27:45,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 07:27:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 07:27:45,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:45,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:27:45,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:27:45,326 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3391 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3391))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:45,361 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3391 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3391)))) is different from true [2022-11-19 07:27:45,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:27:45,438 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:27:45,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:27:45,647 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3394 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3394))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:45,678 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3394 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3394)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:45,757 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_275 (_ BitVec 32)) (v_ArrVal_3394 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3392 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_275 v_ArrVal_3392) nondet_tree_~n~0.base v_ArrVal_3394)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_275) (_ bv0 1)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_275 (_ bv1 1)) nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-19 07:27:45,855 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-19 07:27:45,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:27:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 75 not checked. [2022-11-19 07:27:45,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:46,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697438996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:46,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:27:46,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-11-19 07:27:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608245728] [2022-11-19 07:27:46,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:27:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:27:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:27:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=94, Unknown=12, NotChecked=308, Total=462 [2022-11-19 07:27:46,812 INFO L87 Difference]: Start difference. First operand 273 states and 352 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-19 07:27:47,122 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((v_ArrVal_3394 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3394)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_3393 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3393))) (exists ((v_ArrVal_3392 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3392))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3391 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3391)))) (exists ((v_ArrVal_3163 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3163) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3162 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3162) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:27:47,128 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((v_ArrVal_3394 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3394)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3391 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3391)))) (exists ((v_ArrVal_3162 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3162) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:27:47,298 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_263 (_ BitVec 32)) (v_ArrVal_3163 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3163) v_nondet_tree_~n~0.base_263 (_ bv12 32))))) (exists ((v_nondet_tree_~n~0.base_275 (_ BitVec 32)) (v_ArrVal_3394 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3392 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_275 v_ArrVal_3392) nondet_tree_~n~0.base v_ArrVal_3394)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_275) (_ bv0 1)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_275 (_ bv1 1)) nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:27:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:47,889 INFO L93 Difference]: Finished difference Result 277 states and 356 transitions. [2022-11-19 07:27:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:27:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) Word has length 59 [2022-11-19 07:27:47,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:47,892 INFO L225 Difference]: With dead ends: 277 [2022-11-19 07:27:47,892 INFO L226 Difference]: Without dead ends: 277 [2022-11-19 07:27:47,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=67, Invalid=130, Unknown=15, NotChecked=490, Total=702 [2022-11-19 07:27:47,893 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 176 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2482 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:47,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 235 Invalid, 2800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 272 Invalid, 0 Unknown, 2482 Unchecked, 0.7s Time] [2022-11-19 07:27:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-19 07:27:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2022-11-19 07:27:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 165 states have (on average 1.412121212121212) internal successors, (233), 215 states have internal predecessors, (233), 36 states have call successors, (36), 15 states have call predecessors, (36), 22 states have return successors, (85), 43 states have call predecessors, (85), 36 states have call successors, (85) [2022-11-19 07:27:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 354 transitions. [2022-11-19 07:27:47,903 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 354 transitions. Word has length 59 [2022-11-19 07:27:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:47,903 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 354 transitions. [2022-11-19 07:27:47,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-19 07:27:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 354 transitions. [2022-11-19 07:27:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:27:47,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:47,904 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 07:27:47,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-19 07:27:48,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:48,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:27:48,320 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:27:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1161376289, now seen corresponding path program 2 times [2022-11-19 07:27:48,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:27:48,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258884474] [2022-11-19 07:27:48,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:27:48,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:27:48,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:27:48,322 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:27:48,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-19 07:27:48,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:27:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:27:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:48,833 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3532 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3532))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:48,874 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3532 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3532)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:27:48,895 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:27:49,028 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-19 07:27:49,029 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-19 07:27:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 64 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 25 not checked. [2022-11-19 07:27:49,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:51,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:27:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258884474] [2022-11-19 07:27:51,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258884474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795333923] [2022-11-19 07:27:51,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:27:51,186 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:27:51,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:27:51,187 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:27:51,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-19 07:27:51,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:27:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621099833] [2022-11-19 07:27:51,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:27:51,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:51,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:51,846 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:51,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-19 07:27:51,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 1 [2022-11-19 07:27:52,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:27:52,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:27:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:52,262 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3792 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3792))) is different from true [2022-11-19 07:27:52,293 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3793 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3793))) is different from true [2022-11-19 07:27:54,380 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_297 (_ BitVec 32)) (v_ArrVal_3792 (_ BitVec 1))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3792) v_nondet_tree_~n~0.base_297 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:27:56,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:56,512 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-19 07:27:56,513 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-19 07:27:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 88 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 20 not checked. [2022-11-19 07:27:56,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:56,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621099833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:56,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:27:56,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2022-11-19 07:27:56,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454406975] [2022-11-19 07:27:56,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:56,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:27:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:27:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:27:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=76, Unknown=9, NotChecked=138, Total=272 [2022-11-19 07:27:56,905 INFO L87 Difference]: Start difference. First operand 274 states and 354 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 8 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-19 07:28:01,047 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3793 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3793))) (exists ((v_ArrVal_3792 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3792))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3532 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3532))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:28:01,051 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3793 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3793))) (exists ((v_ArrVal_3792 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3792))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3532 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3532)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:28:11,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:11,345 INFO L93 Difference]: Finished difference Result 282 states and 373 transitions. [2022-11-19 07:28:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:28:11,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 8 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 63 [2022-11-19 07:28:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:11,348 INFO L225 Difference]: With dead ends: 282 [2022-11-19 07:28:11,348 INFO L226 Difference]: Without dead ends: 282 [2022-11-19 07:28:11,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=83, Invalid=116, Unknown=15, NotChecked=248, Total=462 [2022-11-19 07:28:11,349 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 92 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1347 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:11,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 267 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 244 Invalid, 0 Unknown, 1347 Unchecked, 0.5s Time] [2022-11-19 07:28:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-19 07:28:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 274. [2022-11-19 07:28:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 165 states have (on average 1.406060606060606) internal successors, (232), 215 states have internal predecessors, (232), 36 states have call successors, (36), 15 states have call predecessors, (36), 22 states have return successors, (85), 43 states have call predecessors, (85), 36 states have call successors, (85) [2022-11-19 07:28:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 353 transitions. [2022-11-19 07:28:11,360 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 353 transitions. Word has length 63 [2022-11-19 07:28:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:11,360 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 353 transitions. [2022-11-19 07:28:11,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 8 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-19 07:28:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 353 transitions. [2022-11-19 07:28:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:28:11,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:11,362 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1] [2022-11-19 07:28:11,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:11,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-19 07:28:11,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:11,771 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:28:11,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:11,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1877208668, now seen corresponding path program 4 times [2022-11-19 07:28:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:28:11,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650613950] [2022-11-19 07:28:11,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:28:11,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:11,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:28:11,773 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:28:11,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-19 07:28:12,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:28:12,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:12,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 07:28:12,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:12,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:28:12,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:28:12,623 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_3982 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3982) |c_#length|)))) is different from true [2022-11-19 07:28:12,662 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3982 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3982) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:12,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:12,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:28:12,736 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:28:12,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:28:12,786 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3983 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3983) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:12,809 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:28:12,864 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3983 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_312 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_312 v_ArrVal_3983) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_312)))) is different from true [2022-11-19 07:28:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:12,974 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:28:12,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:28:12,996 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:28:12,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:28:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 165 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 81 not checked. [2022-11-19 07:28:13,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:13,390 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:28:13,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650613950] [2022-11-19 07:28:13,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650613950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:13,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541847945] [2022-11-19 07:28:13,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:28:13,391 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:28:13,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:28:13,391 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:28:13,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-19 07:28:14,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:28:14,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 07:28:14,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:14,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:28:14,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:28:14,472 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4170 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4170) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:14,511 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4170 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4170) |c_#length|))) is different from true [2022-11-19 07:28:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:14,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:28:14,610 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:28:14,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:28:14,656 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4171 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4171))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:14,762 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_324 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4171 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_324) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_324 v_ArrVal_4171) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:28:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:14,878 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:28:14,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:28:14,894 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:28:14,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:28:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 163 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 81 not checked. [2022-11-19 07:28:14,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:17,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541847945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:17,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339029011] [2022-11-19 07:28:17,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:28:17,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:17,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:17,271 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:17,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-19 07:28:17,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:28:17,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:17,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:28:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:17,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:28:17,854 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:28:17,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:28:17,937 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4358 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4358) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:18,027 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_336 (_ BitVec 32)) (v_ArrVal_4358 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_336) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_336 v_ArrVal_4358) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:28:18,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:18,143 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:28:18,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:28:18,156 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:28:18,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:28:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 166 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 71 not checked. [2022-11-19 07:28:18,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:20,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339029011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:20,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:20,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 16 [2022-11-19 07:28:20,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947864440] [2022-11-19 07:28:20,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:20,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:28:20,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:28:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:28:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=49, Unknown=11, NotChecked=242, Total=342 [2022-11-19 07:28:20,549 INFO L87 Difference]: Start difference. First operand 274 states and 353 transitions. Second operand has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 14 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (20), 8 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-19 07:28:20,675 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4170 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4170) |c_#length|))) (exists ((v_ArrVal_3982 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3982) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:28:23,329 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_324 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4171 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_324) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_324 v_ArrVal_4171) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_336 (_ BitVec 32)) (v_ArrVal_4358 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_336) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_336 v_ArrVal_4358) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_3983 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_312 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_312 v_ArrVal_3983) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_312))))) is different from true [2022-11-19 07:28:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:23,589 INFO L93 Difference]: Finished difference Result 278 states and 357 transitions. [2022-11-19 07:28:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:28:23,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 14 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (20), 8 states have call predecessors, (20), 14 states have call successors, (20) Word has length 87 [2022-11-19 07:28:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:23,592 INFO L225 Difference]: With dead ends: 278 [2022-11-19 07:28:23,592 INFO L226 Difference]: Without dead ends: 278 [2022-11-19 07:28:23,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 242 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=62, Invalid=86, Unknown=14, NotChecked=390, Total=552 [2022-11-19 07:28:23,593 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 94 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2150 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:23,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 205 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 309 Invalid, 0 Unknown, 2150 Unchecked, 0.7s Time] [2022-11-19 07:28:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-19 07:28:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2022-11-19 07:28:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 166 states have (on average 1.4096385542168675) internal successors, (234), 215 states have internal predecessors, (234), 36 states have call successors, (36), 15 states have call predecessors, (36), 22 states have return successors, (85), 44 states have call predecessors, (85), 36 states have call successors, (85) [2022-11-19 07:28:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 355 transitions. [2022-11-19 07:28:23,603 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 355 transitions. Word has length 87 [2022-11-19 07:28:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:23,603 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 355 transitions. [2022-11-19 07:28:23,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 14 states have call successors, (18), 3 states have call predecessors, (18), 9 states have return successors, (20), 8 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-19 07:28:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 355 transitions. [2022-11-19 07:28:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:28:23,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:23,604 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:28:23,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:23,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:24,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-19 07:28:24,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:24,214 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:28:24,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:24,214 INFO L85 PathProgramCache]: Analyzing trace with hash 357426734, now seen corresponding path program 5 times [2022-11-19 07:28:24,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:28:24,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867653581] [2022-11-19 07:28:24,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:28:24,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:24,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:28:24,216 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:28:24,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-19 07:28:24,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:28:24,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:24,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:28:24,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:24,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:28:24,894 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:28:24,960 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:28:24,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:28:25,043 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4464 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4464) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:25,076 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4464 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4464) |c_#length|))) is different from true [2022-11-19 07:28:25,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:25,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:28:25,151 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:28:25,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:28:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 40 not checked. [2022-11-19 07:28:25,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:27,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:28:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867653581] [2022-11-19 07:28:27,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867653581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1823351821] [2022-11-19 07:28:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:28:27,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:28:27,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:28:27,431 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:28:27,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-19 07:28:28,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:28:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606943269] [2022-11-19 07:28:28,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:28:28,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:28,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:28,082 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:28,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-19 07:28:28,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 1 [2022-11-19 07:28:36,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:28:36,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:36,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:28:36,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:36,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:28:36,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:28:36,520 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4666 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4666) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:36,551 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4666 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4666) |c_#length|))) is different from true [2022-11-19 07:28:36,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:36,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:28:36,619 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:28:36,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:28:36,669 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4667 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4667))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:36,700 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4667 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4667)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:36,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:36,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:28:36,771 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:28:36,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:28:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 40 not checked. [2022-11-19 07:28:36,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:38,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606943269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:38,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:28:38,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-11-19 07:28:38,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718567292] [2022-11-19 07:28:38,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:38,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:28:38,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:28:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:28:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=44, Unknown=8, NotChecked=126, Total=210 [2022-11-19 07:28:38,949 INFO L87 Difference]: Start difference. First operand 275 states and 355 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-19 07:28:39,055 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4667 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4667)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_4464 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4464) |c_#length|))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4666 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4666) |c_#length|)))) is different from true [2022-11-19 07:28:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:39,782 INFO L93 Difference]: Finished difference Result 278 states and 358 transitions. [2022-11-19 07:28:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:28:39,783 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-11-19 07:28:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:39,784 INFO L225 Difference]: With dead ends: 278 [2022-11-19 07:28:39,785 INFO L226 Difference]: Without dead ends: 278 [2022-11-19 07:28:39,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=47, Invalid=65, Unknown=10, NotChecked=184, Total=306 [2022-11-19 07:28:39,786 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 175 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1400 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:39,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 183 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 269 Invalid, 0 Unknown, 1400 Unchecked, 0.7s Time] [2022-11-19 07:28:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-19 07:28:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2022-11-19 07:28:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 166 states have (on average 1.4096385542168675) internal successors, (234), 215 states have internal predecessors, (234), 36 states have call successors, (36), 15 states have call predecessors, (36), 22 states have return successors, (85), 44 states have call predecessors, (85), 36 states have call successors, (85) [2022-11-19 07:28:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 355 transitions. [2022-11-19 07:28:39,795 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 355 transitions. Word has length 49 [2022-11-19 07:28:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:39,796 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 355 transitions. [2022-11-19 07:28:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-19 07:28:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 355 transitions. [2022-11-19 07:28:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:28:39,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:39,797 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1] [2022-11-19 07:28:39,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:40,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-19 07:28:40,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:40,213 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:28:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:40,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1877208667, now seen corresponding path program 3 times [2022-11-19 07:28:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:28:40,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878065029] [2022-11-19 07:28:40,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:40,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:40,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:28:40,215 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:28:40,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-19 07:28:40,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:28:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:28:40,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:40,804 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4850 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4850) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:28:40,833 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4851 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4851))) is different from true [2022-11-19 07:28:40,923 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:28:43,067 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-19 07:28:43,068 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-19 07:28:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 171 proven. 14 refuted. 0 times theorem prover too weak. 126 trivial. 14 not checked. [2022-11-19 07:28:43,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:45,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:28:45,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878065029] [2022-11-19 07:28:45,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878065029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:45,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [940939005] [2022-11-19 07:28:45,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:45,255 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:28:45,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:28:45,257 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:28:45,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-19 07:28:45,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:28:45,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920251489] [2022-11-19 07:28:45,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:45,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:45,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:45,963 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:45,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-19 07:28:45,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 1 [2022-11-19 07:28:48,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:28:48,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:28:48,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:48,546 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5214 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5214) |c_#valid|)) is different from true [2022-11-19 07:28:48,561 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5215 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5215))) is different from true [2022-11-19 07:28:50,707 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_368 (_ BitVec 32)) (v_ArrVal_5214 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5214) v_nondet_tree_~n~0.base_368 (_ bv1 1)))) is different from true [2022-11-19 07:28:52,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:52,843 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-19 07:28:52,843 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-19 07:28:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 171 proven. 17 refuted. 0 times theorem prover too weak. 126 trivial. 11 not checked. [2022-11-19 07:28:52,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:53,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920251489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:53,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:28:53,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-11-19 07:28:53,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045568906] [2022-11-19 07:28:53,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:53,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:28:53,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:28:53,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:28:53,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=76, Unknown=13, NotChecked=138, Total=272 [2022-11-19 07:28:53,119 INFO L87 Difference]: Start difference. First operand 275 states and 355 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 8 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:28:57,604 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_4851 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4851) |c_#valid|)))) (exists ((v_ArrVal_5215 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5215))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4850 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4850) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_5214 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5214) |c_#valid|))) is different from true [2022-11-19 07:28:57,608 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_4851 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4851) |c_#valid|)))) (exists ((v_ArrVal_5215 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5215)))) is different from true [2022-11-19 07:29:01,661 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_368 (_ BitVec 32)) (v_ArrVal_5214 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5214) v_nondet_tree_~n~0.base_368 (_ bv1 1)))) (exists ((v_ArrVal_5215 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5215))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-19 07:29:01,671 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_4851 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4851) |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-19 07:29:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:12,490 INFO L93 Difference]: Finished difference Result 281 states and 361 transitions. [2022-11-19 07:29:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:29:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 8 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 87 [2022-11-19 07:29:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:12,493 INFO L225 Difference]: With dead ends: 281 [2022-11-19 07:29:12,493 INFO L226 Difference]: Without dead ends: 281 [2022-11-19 07:29:12,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 163 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=92, Invalid=133, Unknown=25, NotChecked=350, Total=600 [2022-11-19 07:29:12,494 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 93 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1813 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:12,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 422 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 244 Invalid, 0 Unknown, 1813 Unchecked, 0.5s Time] [2022-11-19 07:29:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-19 07:29:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2022-11-19 07:29:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 165 states have (on average 1.406060606060606) internal successors, (232), 215 states have internal predecessors, (232), 36 states have call successors, (36), 15 states have call predecessors, (36), 22 states have return successors, (85), 43 states have call predecessors, (85), 36 states have call successors, (85) [2022-11-19 07:29:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 353 transitions. [2022-11-19 07:29:12,504 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 353 transitions. Word has length 87 [2022-11-19 07:29:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:12,505 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 353 transitions. [2022-11-19 07:29:12,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 8 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:29:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 353 transitions. [2022-11-19 07:29:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:29:12,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:12,506 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:29:12,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:12,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:12,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:12,922 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:29:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2043418542, now seen corresponding path program 6 times [2022-11-19 07:29:12,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:12,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997380899] [2022-11-19 07:29:12,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 07:29:12,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:12,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:12,924 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:12,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-19 07:29:13,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-19 07:29:13,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:13,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:29:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:13,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:29:13,621 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:13,676 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5325 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5325))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:13,711 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:29:13,776 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5325 (_ BitVec 32)) (v_nondet_tree_~n~0.base_379 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_379 v_ArrVal_5325) nondet_tree_~n~0.base (_ bv12 32))) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_379) (_ bv0 1)))) is different from true [2022-11-19 07:29:13,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:13,887 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:29:13,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:29:13,901 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:29:13,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:29:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 40 not checked. [2022-11-19 07:29:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:14,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997380899] [2022-11-19 07:29:14,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997380899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1551181772] [2022-11-19 07:29:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 07:29:14,661 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:14,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:14,662 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:14,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-19 07:29:15,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:29:15,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194486075] [2022-11-19 07:29:15,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 07:29:15,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:15,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:15,329 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:15,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-19 07:29:15,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 1 [2022-11-19 07:29:18,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-19 07:29:18,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:29:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:18,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:29:18,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:18,349 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5529 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5529))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:18,449 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5529 (_ BitVec 32)) (v_nondet_tree_~n~0.base_390 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5529) v_nondet_tree_~n~0.base_390 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:18,562 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:29:18,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:29:18,581 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:29:18,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:29:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 40 not checked. [2022-11-19 07:29:18,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:25,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194486075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:25,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:29:25,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-19 07:29:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560315717] [2022-11-19 07:29:25,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:29:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:29:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=82, Unknown=8, NotChecked=110, Total=240 [2022-11-19 07:29:25,912 INFO L87 Difference]: Start difference. First operand 274 states and 353 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-19 07:29:26,617 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5325 (_ BitVec 32)) (v_nondet_tree_~n~0.base_379 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_379 v_ArrVal_5325) nondet_tree_~n~0.base (_ bv12 32))) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_379) (_ bv0 1)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5529 (_ BitVec 32)) (v_nondet_tree_~n~0.base_390 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5529) v_nondet_tree_~n~0.base_390 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:29:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:26,923 INFO L93 Difference]: Finished difference Result 296 states and 394 transitions. [2022-11-19 07:29:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:29:26,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 49 [2022-11-19 07:29:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:26,927 INFO L225 Difference]: With dead ends: 296 [2022-11-19 07:29:26,927 INFO L226 Difference]: Without dead ends: 296 [2022-11-19 07:29:26,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=59, Invalid=111, Unknown=10, NotChecked=162, Total=342 [2022-11-19 07:29:26,928 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 176 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1008 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:26,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 222 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 410 Invalid, 0 Unknown, 1008 Unchecked, 0.9s Time] [2022-11-19 07:29:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-19 07:29:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-11-19 07:29:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 179 states have (on average 1.3798882681564246) internal successors, (247), 232 states have internal predecessors, (247), 40 states have call successors, (40), 16 states have call predecessors, (40), 25 states have return successors, (106), 46 states have call predecessors, (106), 40 states have call successors, (106) [2022-11-19 07:29:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 393 transitions. [2022-11-19 07:29:26,949 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 393 transitions. Word has length 49 [2022-11-19 07:29:26,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:26,949 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 393 transitions. [2022-11-19 07:29:26,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-19 07:29:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 393 transitions. [2022-11-19 07:29:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:29:26,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:26,952 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:26,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:27,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:27,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:27,369 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:29:27,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1322566655, now seen corresponding path program 1 times [2022-11-19 07:29:27,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:27,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874780879] [2022-11-19 07:29:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:27,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:27,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:27,371 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:27,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-19 07:29:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:27,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:29:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:27,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:27,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:28,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-19 07:29:28,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-19 07:29:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:29:28,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:29:28,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874780879] [2022-11-19 07:29:28,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874780879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1515525263] [2022-11-19 07:29:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:28,708 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:28,711 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:28,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-19 07:29:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:29:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:29,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:29,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:30,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:29:30,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:29:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:29:30,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:29:30,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1515525263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:30,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813601980] [2022-11-19 07:29:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:30,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:30,684 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:30,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-19 07:29:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:29:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:31,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:31,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:31,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:29:31,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:29:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:29:31,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:29:31,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813601980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:31,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:29:31,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15, 13, 15, 13] total 23 [2022-11-19 07:29:31,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778965441] [2022-11-19 07:29:31,861 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:31,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:29:31,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:29:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:29:31,863 INFO L87 Difference]: Start difference. First operand 295 states and 393 transitions. Second operand has 23 states, 20 states have (on average 2.5) internal successors, (50), 16 states have internal predecessors, (50), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-19 07:29:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:32,962 INFO L93 Difference]: Finished difference Result 345 states and 471 transitions. [2022-11-19 07:29:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:29:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.5) internal successors, (50), 16 states have internal predecessors, (50), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 38 [2022-11-19 07:29:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:32,964 INFO L225 Difference]: With dead ends: 345 [2022-11-19 07:29:32,964 INFO L226 Difference]: Without dead ends: 345 [2022-11-19 07:29:32,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:29:32,965 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 74 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 2423 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:32,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 2423 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 321 Invalid, 0 Unknown, 126 Unchecked, 0.8s Time] [2022-11-19 07:29:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-19 07:29:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 329. [2022-11-19 07:29:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 205 states have (on average 1.3707317073170733) internal successors, (281), 257 states have internal predecessors, (281), 45 states have call successors, (45), 19 states have call predecessors, (45), 28 states have return successors, (127), 52 states have call predecessors, (127), 45 states have call successors, (127) [2022-11-19 07:29:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 453 transitions. [2022-11-19 07:29:32,977 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 453 transitions. Word has length 38 [2022-11-19 07:29:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:32,977 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 453 transitions. [2022-11-19 07:29:32,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.5) internal successors, (50), 16 states have internal predecessors, (50), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-19 07:29:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 453 transitions. [2022-11-19 07:29:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:29:32,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:32,979 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:29:32,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:33,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-19 07:29:33,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-19 07:29:33,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:33,584 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:29:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1610513618, now seen corresponding path program 7 times [2022-11-19 07:29:33,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:33,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947245754] [2022-11-19 07:29:33,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:29:33,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:33,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:33,585 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:33,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-19 07:29:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:34,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:29:34,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:34,128 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:29:34,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:34,261 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5746 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5746))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:34,308 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5746 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5746)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:34,337 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:29:34,407 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_410 (_ BitVec 32)) (v_ArrVal_5746 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_410 v_ArrVal_5746) nondet_tree_~n~0.base (_ bv12 32))) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_410) (_ bv0 1)))) is different from true [2022-11-19 07:29:34,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:34,483 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:29:34,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:29:34,504 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:29:34,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:29:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 40 not checked. [2022-11-19 07:29:34,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:36,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:36,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947245754] [2022-11-19 07:29:36,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947245754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:36,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2088265794] [2022-11-19 07:29:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:29:36,875 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:36,876 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:36,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-19 07:29:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:29:37,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:37,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:29:37,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:37,834 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5852 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5852) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:37,866 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5852 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5852) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:37,944 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5852 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_421 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5852) v_nondet_tree_~n~0.base_421 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:37,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:38,017 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:29:38,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:29:38,032 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:29:38,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:29:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 40 not checked. [2022-11-19 07:29:38,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:40,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2088265794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:40,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098884082] [2022-11-19 07:29:40,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:29:40,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:40,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:40,700 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:40,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-19 07:29:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 07:29:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:41,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:41,259 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5957 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5957))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_5958 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5958) |c_#length|)))) is different from true [2022-11-19 07:29:41,310 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5957 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5958 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5958) |c_#length|) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5957)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:41,352 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5959 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5959))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:41,386 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5959 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5959)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:41,463 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5957 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5959 (_ BitVec 32)) (v_nondet_tree_~n~0.base_432 (_ BitVec 32)) (v_ArrVal_5958 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_432)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_432 v_ArrVal_5958) nondet_tree_~n~0.base v_ArrVal_5959)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_432 v_ArrVal_5957) nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:41,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:41,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:41,547 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:29:41,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:29:41,589 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-19 07:29:41,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-19 07:29:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 40 not checked. [2022-11-19 07:29:41,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:44,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098884082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:44,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:44,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-11-19 07:29:44,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719000733] [2022-11-19 07:29:44,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:44,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:29:44,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:44,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:29:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=61, Unknown=14, NotChecked=300, Total=420 [2022-11-19 07:29:44,686 INFO L87 Difference]: Start difference. First operand 329 states and 453 transitions. Second operand has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 18 states have internal predecessors, (59), 12 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-19 07:29:44,876 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5959 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5959)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:29:45,055 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_410 (_ BitVec 32)) (v_ArrVal_5746 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_410 v_ArrVal_5746) nondet_tree_~n~0.base (_ bv12 32))) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_410) (_ bv0 1)))) (exists ((v_ArrVal_5957 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5959 (_ BitVec 32)) (v_nondet_tree_~n~0.base_432 (_ BitVec 32)) (v_ArrVal_5958 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_432)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_432 v_ArrVal_5958) nondet_tree_~n~0.base v_ArrVal_5959)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_432 v_ArrVal_5957) nondet_tree_~n~0.base)))) (exists ((v_ArrVal_5852 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_421 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5852) v_nondet_tree_~n~0.base_421 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:29:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:45,709 INFO L93 Difference]: Finished difference Result 330 states and 454 transitions. [2022-11-19 07:29:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:29:45,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 18 states have internal predecessors, (59), 12 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 49 [2022-11-19 07:29:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:45,712 INFO L225 Difference]: With dead ends: 330 [2022-11-19 07:29:45,712 INFO L226 Difference]: Without dead ends: 330 [2022-11-19 07:29:45,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=56, Invalid=74, Unknown=16, NotChecked=406, Total=552 [2022-11-19 07:29:45,713 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 173 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2370 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:45,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 225 Invalid, 2819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 406 Invalid, 0 Unknown, 2370 Unchecked, 0.8s Time] [2022-11-19 07:29:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-19 07:29:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2022-11-19 07:29:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 205 states have (on average 1.3707317073170733) internal successors, (281), 257 states have internal predecessors, (281), 45 states have call successors, (45), 19 states have call predecessors, (45), 28 states have return successors, (127), 52 states have call predecessors, (127), 45 states have call successors, (127) [2022-11-19 07:29:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 453 transitions. [2022-11-19 07:29:45,724 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 453 transitions. Word has length 49 [2022-11-19 07:29:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:45,724 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 453 transitions. [2022-11-19 07:29:45,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 18 states have internal predecessors, (59), 12 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-19 07:29:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 453 transitions. [2022-11-19 07:29:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:29:45,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:45,726 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:29:45,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:45,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-19 07:29:46,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:46,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:46,341 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:29:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash 628904546, now seen corresponding path program 8 times [2022-11-19 07:29:46,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:46,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691244142] [2022-11-19 07:29:46,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:29:46,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:46,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:46,343 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:46,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-19 07:29:46,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:29:46,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:47,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:29:47,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:47,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:29:47,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:47,119 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6101 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6101) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:47,152 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:29:47,208 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6101 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_443 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6101) v_nondet_tree_~n~0.base_443 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:47,313 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:29:47,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:29:47,332 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:29:47,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:29:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 90 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-19 07:29:47,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:48,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:48,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691244142] [2022-11-19 07:29:48,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691244142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:48,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [685196778] [2022-11-19 07:29:48,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:29:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:48,416 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:48,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-19 07:29:49,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:29:49,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:49,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:29:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:49,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:49,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:29:49,476 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6236 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6236) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:49,565 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6236 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_454 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6236) v_nondet_tree_~n~0.base_454 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:49,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:49,706 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:29:49,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:29:49,725 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:29:49,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:29:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 90 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-19 07:29:49,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:52,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [685196778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606721600] [2022-11-19 07:29:52,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:29:52,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:52,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:52,136 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:52,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-19 07:29:52,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:29:52,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:29:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:52,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:52,857 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6372 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6372) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:52,888 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6372 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6372) |c_#length|))) is different from true [2022-11-19 07:29:52,958 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6372 (_ BitVec 32)) (v_nondet_tree_~n~0.base_465 (_ BitVec 32)) (v_ArrVal_6370 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_465) (_ bv0 1)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6370) v_nondet_tree_~n~0.base_465 v_ArrVal_6372) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:29:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-19 07:29:53,093 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-19 07:29:53,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:29:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 92 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 37 not checked. [2022-11-19 07:29:53,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:54,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606721600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:54,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:54,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-11-19 07:29:54,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355024287] [2022-11-19 07:29:54,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:54,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:29:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:29:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=92, Unknown=8, NotChecked=200, Total=342 [2022-11-19 07:29:54,266 INFO L87 Difference]: Start difference. First operand 329 states and 453 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-19 07:29:54,548 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6372 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6372) |c_#length|)))) is different from true [2022-11-19 07:29:55,006 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6236 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_454 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6236) v_nondet_tree_~n~0.base_454 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_6101 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_443 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6101) v_nondet_tree_~n~0.base_443 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6372 (_ BitVec 32)) (v_nondet_tree_~n~0.base_465 (_ BitVec 32)) (v_ArrVal_6370 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_465) (_ bv0 1)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6370) v_nondet_tree_~n~0.base_465 v_ArrVal_6372) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:29:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:55,270 INFO L93 Difference]: Finished difference Result 330 states and 454 transitions. [2022-11-19 07:29:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:29:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) Word has length 65 [2022-11-19 07:29:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:55,273 INFO L225 Difference]: With dead ends: 330 [2022-11-19 07:29:55,273 INFO L226 Difference]: Without dead ends: 330 [2022-11-19 07:29:55,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=73, Invalid=138, Unknown=11, NotChecked=330, Total=552 [2022-11-19 07:29:55,274 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 93 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1900 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:55,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 262 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 305 Invalid, 0 Unknown, 1900 Unchecked, 0.7s Time] [2022-11-19 07:29:55,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-19 07:29:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2022-11-19 07:29:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 205 states have (on average 1.3707317073170733) internal successors, (281), 257 states have internal predecessors, (281), 45 states have call successors, (45), 19 states have call predecessors, (45), 28 states have return successors, (127), 52 states have call predecessors, (127), 45 states have call successors, (127) [2022-11-19 07:29:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 453 transitions. [2022-11-19 07:29:55,285 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 453 transitions. Word has length 65 [2022-11-19 07:29:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:55,286 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 453 transitions. [2022-11-19 07:29:55,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-19 07:29:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 453 transitions. [2022-11-19 07:29:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:29:55,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:55,288 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:55,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:55,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:55,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:55,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:55,900 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:29:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1134522260, now seen corresponding path program 2 times [2022-11-19 07:29:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:55,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448479897] [2022-11-19 07:29:55,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:29:55,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:55,902 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:55,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-19 07:29:56,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:29:56,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:56,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 07:29:56,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:56,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:29:56,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:56,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-19 07:29:56,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 07:29:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:29:56,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:29:57,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:57,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448479897] [2022-11-19 07:29:57,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448479897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:57,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26499030] [2022-11-19 07:29:57,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:29:57,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:57,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:57,533 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:57,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-19 07:29:58,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:29:58,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:29:58,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:58,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:29:58,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:58,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-19 07:29:59,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:29:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:29:59,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:29:59,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26499030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:59,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943314522] [2022-11-19 07:29:59,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:29:59,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:59,751 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:59,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-19 07:30:00,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:30:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:30:00,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:30:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:00,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:30:00,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-19 07:30:00,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:30:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:30:00,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:30:01,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943314522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:01,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:30:01,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16, 15, 16, 15] total 25 [2022-11-19 07:30:01,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125505774] [2022-11-19 07:30:01,039 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:01,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:30:01,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:30:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:30:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:30:01,041 INFO L87 Difference]: Start difference. First operand 329 states and 453 transitions. Second operand has 26 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:30:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:05,095 INFO L93 Difference]: Finished difference Result 364 states and 501 transitions. [2022-11-19 07:30:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:30:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) Word has length 45 [2022-11-19 07:30:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:05,098 INFO L225 Difference]: With dead ends: 364 [2022-11-19 07:30:05,098 INFO L226 Difference]: Without dead ends: 364 [2022-11-19 07:30:05,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 237 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:30:05,099 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 98 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2761 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:05,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2761 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1924 Invalid, 0 Unknown, 352 Unchecked, 3.6s Time] [2022-11-19 07:30:05,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-19 07:30:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 348. [2022-11-19 07:30:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 220 states have (on average 1.3818181818181818) internal successors, (304), 272 states have internal predecessors, (304), 47 states have call successors, (47), 20 states have call predecessors, (47), 30 states have return successors, (129), 55 states have call predecessors, (129), 47 states have call successors, (129) [2022-11-19 07:30:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 480 transitions. [2022-11-19 07:30:05,111 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 480 transitions. Word has length 45 [2022-11-19 07:30:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:05,111 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 480 transitions. [2022-11-19 07:30:05,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:30:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 480 transitions. [2022-11-19 07:30:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:30:05,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:05,113 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:05,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:05,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:05,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-19 07:30:05,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:05,725 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:30:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1134522261, now seen corresponding path program 1 times [2022-11-19 07:30:05,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:30:05,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100750769] [2022-11-19 07:30:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:05,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:30:05,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:30:05,726 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:30:05,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-19 07:30:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:06,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:30:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:06,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:30:06,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:30:06,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:30:06,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 07:30:06,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:30:06,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-19 07:30:06,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-19 07:30:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:30:07,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:30:12,234 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:30:12,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100750769] [2022-11-19 07:30:12,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100750769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:12,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339595519] [2022-11-19 07:30:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:12,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:30:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:30:12,235 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:30:12,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-19 07:30:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 07:30:13,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:13,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:30:13,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:30:13,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:30:13,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 07:30:13,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:30:14,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:30:14,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-19 07:30:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:30:14,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:30:18,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339595519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107659256] [2022-11-19 07:30:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:18,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:18,219 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:18,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-19 07:30:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 07:30:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:18,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:30:18,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:30:18,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:30:18,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 07:30:18,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:30:19,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:30:19,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-19 07:30:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:30:19,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:30:23,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107659256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:23,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:30:23,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16, 15, 16, 15] total 37 [2022-11-19 07:30:23,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968009316] [2022-11-19 07:30:23,227 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:23,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:30:23,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:30:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:30:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:30:23,229 INFO L87 Difference]: Start difference. First operand 348 states and 480 transitions. Second operand has 38 states, 32 states have (on average 2.21875) internal successors, (71), 27 states have internal predecessors, (71), 12 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:30:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:41,502 INFO L93 Difference]: Finished difference Result 391 states and 536 transitions. [2022-11-19 07:30:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:30:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 2.21875) internal successors, (71), 27 states have internal predecessors, (71), 12 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) Word has length 45 [2022-11-19 07:30:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:41,506 INFO L225 Difference]: With dead ends: 391 [2022-11-19 07:30:41,506 INFO L226 Difference]: Without dead ends: 391 [2022-11-19 07:30:41,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=275, Invalid=3031, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:30:41,508 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 140 mSDsluCounter, 3576 mSDsCounter, 0 mSdLazyCounter, 2886 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 3831 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:41,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 3831 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2886 Invalid, 0 Unknown, 220 Unchecked, 13.1s Time] [2022-11-19 07:30:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-19 07:30:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 378. [2022-11-19 07:30:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 243 states have (on average 1.3621399176954732) internal successors, (331), 295 states have internal predecessors, (331), 52 states have call successors, (52), 22 states have call predecessors, (52), 32 states have return successors, (134), 60 states have call predecessors, (134), 52 states have call successors, (134) [2022-11-19 07:30:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 517 transitions. [2022-11-19 07:30:41,523 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 517 transitions. Word has length 45 [2022-11-19 07:30:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:41,524 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 517 transitions. [2022-11-19 07:30:41,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 2.21875) internal successors, (71), 27 states have internal predecessors, (71), 12 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:30:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 517 transitions. [2022-11-19 07:30:41,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 07:30:41,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:41,526 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:30:41,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:41,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:41,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-19 07:30:42,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:42,144 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:30:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:42,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1796270964, now seen corresponding path program 9 times [2022-11-19 07:30:42,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:30:42,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856211658] [2022-11-19 07:30:42,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:30:42,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:30:42,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:30:42,146 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:30:42,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-19 07:30:42,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:30:42,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:30:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:30:42,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:42,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:30:43,048 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:30:43,158 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6960 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_545 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6960) v_nondet_tree_~n~0.base_545 (_ bv12 32))))) is different from true [2022-11-19 07:30:43,250 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:30:43,250 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-19 07:30:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 3 refuted. 4 times theorem prover too weak. 36 trivial. 33 not checked. [2022-11-19 07:30:43,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:45,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:30:45,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856211658] [2022-11-19 07:30:45,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856211658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:45,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087932303] [2022-11-19 07:30:45,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:30:45,233 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:30:45,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:30:45,234 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:30:45,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-19 07:30:46,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:30:46,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:30:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:30:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:46,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:30:46,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:30:46,799 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:30:46,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:30:46,907 WARN L859 $PredicateComparison]: unable to prove that (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= (store (store |c_old(#length)| c_nondet_tree_~n~0.base (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|) (not (= c_nondet_tree_~n~0.base |nondet_tree_#t~ret9.base|)))) is different from true [2022-11-19 07:30:46,921 WARN L859 $PredicateComparison]: unable to prove that (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (not (= |c_nondet_tree_#res.base| |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| |c_nondet_tree_#res.base| (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:30:46,970 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-19 07:30:46,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-19 07:30:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 65 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 11 not checked. [2022-11-19 07:30:47,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:48,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:30:48,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087932303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:48,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235783493] [2022-11-19 07:30:48,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:30:48,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:48,802 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:48,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-19 07:30:52,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:30:52,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:30:52,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:30:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:52,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:30:52,567 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7221 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7221))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:30:52,604 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7221 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7221)))) is different from true [2022-11-19 07:30:52,698 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_563 (_ BitVec 32)) (v_ArrVal_7221 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_563 v_ArrVal_7221) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_563)))) is different from true [2022-11-19 07:30:52,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:52,781 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:30:52,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-19 07:30:52,804 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:30:52,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:30:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-19 07:30:52,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:54,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235783493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:54,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:54,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 9] total 21 [2022-11-19 07:30:54,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709789300] [2022-11-19 07:30:54,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:54,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:30:54,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:30:54,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:30:54,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=342, Unknown=17, NotChecked=308, Total=756 [2022-11-19 07:30:54,062 INFO L87 Difference]: Start difference. First operand 378 states and 517 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 19 states have internal predecessors, (67), 11 states have call successors, (18), 3 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-19 07:30:55,459 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= (store (store |c_old(#length)| c_nondet_tree_~n~0.base (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|) (not (= c_nondet_tree_~n~0.base |nondet_tree_#t~ret9.base|)))) (exists ((v_ArrVal_6960 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_545 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6960) v_nondet_tree_~n~0.base_545 (_ bv12 32))))) (exists ((v_nondet_tree_~n~0.base_563 (_ BitVec 32)) (v_ArrVal_7221 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_563 v_ArrVal_7221) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_563))))) is different from true [2022-11-19 07:30:55,467 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (not (= |c_nondet_tree_#res.base| |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| |c_nondet_tree_#res.base| (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_6960 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_545 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6960) v_nondet_tree_~n~0.base_545 (_ bv12 32))))) (exists ((v_nondet_tree_~n~0.base_563 (_ BitVec 32)) (v_ArrVal_7221 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_563 v_ArrVal_7221) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_563))))) is different from true [2022-11-19 07:30:56,715 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((v_ArrVal_6960 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_545 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6960) v_nondet_tree_~n~0.base_545 (_ bv12 32)))))) is different from true [2022-11-19 07:30:59,144 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= (store (store |c_old(#length)| c_nondet_tree_~n~0.base (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|) (not (= c_nondet_tree_~n~0.base |nondet_tree_#t~ret9.base|)))) (exists ((v_ArrVal_6960 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_545 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6960) v_nondet_tree_~n~0.base_545 (_ bv12 32)))))) is different from true [2022-11-19 07:30:59,151 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (not (= |c_nondet_tree_#res.base| |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| |c_nondet_tree_#res.base| (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_6960 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_545 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6960) v_nondet_tree_~n~0.base_545 (_ bv12 32)))))) is different from true [2022-11-19 07:30:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:59,568 INFO L93 Difference]: Finished difference Result 398 states and 553 transitions. [2022-11-19 07:30:59,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:30:59,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 19 states have internal predecessors, (67), 11 states have call successors, (18), 3 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) Word has length 59 [2022-11-19 07:30:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:59,572 INFO L225 Difference]: With dead ends: 398 [2022-11-19 07:30:59,572 INFO L226 Difference]: Without dead ends: 398 [2022-11-19 07:30:59,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 175 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=174, Invalid=551, Unknown=25, NotChecked=732, Total=1482 [2022-11-19 07:30:59,573 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 102 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1912 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:59,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 531 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 917 Invalid, 0 Unknown, 1912 Unchecked, 2.1s Time] [2022-11-19 07:30:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-19 07:30:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 393. [2022-11-19 07:30:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 253 states have (on average 1.3517786561264822) internal successors, (342), 307 states have internal predecessors, (342), 55 states have call successors, (55), 23 states have call predecessors, (55), 34 states have return successors, (151), 62 states have call predecessors, (151), 55 states have call successors, (151) [2022-11-19 07:30:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 548 transitions. [2022-11-19 07:30:59,587 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 548 transitions. Word has length 59 [2022-11-19 07:30:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:59,587 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 548 transitions. [2022-11-19 07:30:59,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 19 states have internal predecessors, (67), 11 states have call successors, (18), 3 states have call predecessors, (18), 8 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-19 07:30:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 548 transitions. [2022-11-19 07:30:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 07:30:59,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:59,590 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 07:30:59,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:59,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:00,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:00,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:00,203 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:31:00,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:00,203 INFO L85 PathProgramCache]: Analyzing trace with hash -313154346, now seen corresponding path program 10 times [2022-11-19 07:31:00,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:31:00,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077167115] [2022-11-19 07:31:00,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:31:00,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:31:00,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:31:00,205 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:31:00,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-19 07:31:01,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:31:01,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:01,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:31:01,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:01,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:31:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:31:01,203 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_7385 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7385))))) is different from true [2022-11-19 07:31:01,290 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:31:01,548 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_7386 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7386) v_nondet_tree_~n~0.base_574 (_ bv12 32))))) is different from true [2022-11-19 07:31:01,597 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_7386 (_ BitVec 32)) (v_ArrVal_7385 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_575 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_575 v_ArrVal_7385) nondet_tree_~n~0.base v_ArrVal_7386) v_nondet_tree_~n~0.base_574 (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_575) (_ bv0 1)))) is different from true [2022-11-19 07:31:01,679 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_7386 (_ BitVec 32)) (v_ArrVal_7385 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_575 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_575 v_ArrVal_7385) nondet_tree_~n~0.base v_ArrVal_7386) v_nondet_tree_~n~0.base_574 (_ bv12 32)))) (and (= .cse0 |c_#length|) (bvule (_ bv12 32) (select .cse0 nondet_tree_~n~0.base)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_575) (_ bv0 1))))) is different from true [2022-11-19 07:31:01,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:01,870 INFO L321 Elim1Store]: treesize reduction 59, result has 34.4 percent of original size [2022-11-19 07:31:01,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 51 [2022-11-19 07:31:01,901 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:31:01,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:31:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 26 refuted. 1 times theorem prover too weak. 46 trivial. 74 not checked. [2022-11-19 07:31:02,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:06,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:31:06,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077167115] [2022-11-19 07:31:06,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077167115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:06,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [188345759] [2022-11-19 07:31:06,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:31:06,871 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:31:06,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:31:06,872 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:31:06,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-19 07:31:08,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:31:08,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:08,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:31:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:08,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:31:08,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:31:08,446 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7556 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7556) |c_#length|)) (exists ((v_ArrVal_7557 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7557))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:31:08,492 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7558 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7558) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:31:08,592 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7558 (_ BitVec 32)) (v_nondet_tree_~n~0.base_595 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_595) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_595 v_ArrVal_7558) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-19 07:31:08,706 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7558 (_ BitVec 32)) (v_ArrVal_7556 (_ BitVec 32)) (v_nondet_tree_~n~0.base_595 (_ BitVec 32)) (v_nondet_tree_~n~0.base_596 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7557 (_ BitVec 1))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7557) v_nondet_tree_~n~0.base_595) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7556) v_nondet_tree_~n~0.base_595 v_ArrVal_7558) v_nondet_tree_~n~0.base_596 (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:31:08,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:08,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:08,975 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-19 07:31:08,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-11-19 07:31:09,046 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-19 07:31:09,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-19 07:31:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 81 not checked. [2022-11-19 07:31:09,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:11,669 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv12 32) c_nondet_tree_~n~0.offset))) (and (forall ((v_nondet_tree_~n~0.base_613 (_ BitVec 32))) (or (not (= (select |c_#valid| v_nondet_tree_~n~0.base_613) (_ bv0 1))) (forall ((v_ArrVal_7572 (_ BitVec 1)) (v_nondet_tree_~n~0.base_614 (_ BitVec 32))) (or (forall ((v_ArrVal_7571 (_ BitVec 32)) (v_ArrVal_7570 (_ BitVec 32)) (v_nondet_tree_~n~0.base_615 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_nondet_tree_~n~0.base_613 v_ArrVal_7571) v_nondet_tree_~n~0.base_614 v_ArrVal_7570) v_nondet_tree_~n~0.base_615 (_ bv12 32)) c_nondet_tree_~n~0.base))) (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_613 v_ArrVal_7572) v_nondet_tree_~n~0.base_614))))))) (or (bvule (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset) .cse0) (forall ((v_ArrVal_7572 (_ BitVec 1)) (v_nondet_tree_~n~0.base_614 (_ BitVec 32)) (v_nondet_tree_~n~0.base_613 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_613 v_ArrVal_7572) v_nondet_tree_~n~0.base_614))) (not (= (select |c_#valid| v_nondet_tree_~n~0.base_613) (_ bv0 1)))))))) is different from false [2022-11-19 07:31:11,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [188345759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:11,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765751414] [2022-11-19 07:31:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:31:11,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:11,676 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:11,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-19 07:31:12,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:31:12,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:12,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:31:12,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:12,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:31:12,397 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7730 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7730) |c_#length|)) (exists ((v_ArrVal_7731 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7731))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:31:12,435 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7732 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7732))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:31:12,530 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7732 (_ BitVec 32)) (v_nondet_tree_~n~0.base_616 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_616 v_ArrVal_7732) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_616)))) is different from true [2022-11-19 07:31:12,626 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7732 (_ BitVec 32)) (v_nondet_tree_~n~0.base_616 (_ BitVec 32)) (v_nondet_tree_~n~0.base_617 (_ BitVec 32)) (v_ArrVal_7730 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7731 (_ BitVec 1))) (and (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_617 v_ArrVal_7731) v_nondet_tree_~n~0.base_616)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_617)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_617 v_ArrVal_7730) v_nondet_tree_~n~0.base_616 v_ArrVal_7732) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:31:12,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:12,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:12,887 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-19 07:31:12,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-11-19 07:31:12,962 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-19 07:31:12,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-19 07:31:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 122 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 81 not checked. [2022-11-19 07:31:13,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:20,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765751414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:20,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:20,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 22 [2022-11-19 07:31:20,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942926910] [2022-11-19 07:31:20,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:20,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:31:20,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:31:20,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:31:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=107, Unknown=23, NotChecked=462, Total=650 [2022-11-19 07:31:20,353 INFO L87 Difference]: Start difference. First operand 393 states and 548 transitions. Second operand has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 16 states have call successors, (20), 3 states have call predecessors, (20), 10 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) [2022-11-19 07:31:20,979 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_7386 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7386) v_nondet_tree_~n~0.base_574 (_ bv12 32)))))) is different from true [2022-11-19 07:31:52,887 WARN L233 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 49 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:32:01,099 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_7386 (_ BitVec 32)) (v_ArrVal_7385 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_575 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_575 v_ArrVal_7385) nondet_tree_~n~0.base v_ArrVal_7386) v_nondet_tree_~n~0.base_574 (_ bv12 32)))) (and (= .cse0 |c_#length|) (bvule (_ bv12 32) (select .cse0 nondet_tree_~n~0.base)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_575) (_ bv0 1))))) (exists ((v_ArrVal_7558 (_ BitVec 32)) (v_nondet_tree_~n~0.base_595 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_595) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_595 v_ArrVal_7558) nondet_tree_~n~0.base (_ bv12 32))))) (exists ((v_ArrVal_7732 (_ BitVec 32)) (v_nondet_tree_~n~0.base_616 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_616 v_ArrVal_7732) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_616)))) (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_7386 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7386) v_nondet_tree_~n~0.base_574 (_ bv12 32)))))) is different from true [2022-11-19 07:32:01,112 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_7732 (_ BitVec 32)) (v_nondet_tree_~n~0.base_616 (_ BitVec 32)) (v_nondet_tree_~n~0.base_617 (_ BitVec 32)) (v_ArrVal_7730 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7731 (_ BitVec 1))) (and (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_617 v_ArrVal_7731) v_nondet_tree_~n~0.base_616)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_617)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_617 v_ArrVal_7730) v_nondet_tree_~n~0.base_616 v_ArrVal_7732) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_7558 (_ BitVec 32)) (v_ArrVal_7556 (_ BitVec 32)) (v_nondet_tree_~n~0.base_595 (_ BitVec 32)) (v_nondet_tree_~n~0.base_596 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7557 (_ BitVec 1))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7557) v_nondet_tree_~n~0.base_595) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7556) v_nondet_tree_~n~0.base_595 v_ArrVal_7558) v_nondet_tree_~n~0.base_596 (_ bv12 32)) |c_#length|))) (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_7386 (_ BitVec 32)) (v_ArrVal_7385 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_575 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_575 v_ArrVal_7385) nondet_tree_~n~0.base v_ArrVal_7386) v_nondet_tree_~n~0.base_574 (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_575) (_ bv0 1))))) is different from true [2022-11-19 07:32:01,124 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_7732 (_ BitVec 32)) (v_nondet_tree_~n~0.base_616 (_ BitVec 32)) (v_nondet_tree_~n~0.base_617 (_ BitVec 32)) (v_ArrVal_7730 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7731 (_ BitVec 1))) (and (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_617 v_ArrVal_7731) v_nondet_tree_~n~0.base_616)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_617)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_617 v_ArrVal_7730) v_nondet_tree_~n~0.base_616 v_ArrVal_7732) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_7558 (_ BitVec 32)) (v_ArrVal_7556 (_ BitVec 32)) (v_nondet_tree_~n~0.base_595 (_ BitVec 32)) (v_nondet_tree_~n~0.base_596 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7557 (_ BitVec 1))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7557) v_nondet_tree_~n~0.base_595) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7556) v_nondet_tree_~n~0.base_595 v_ArrVal_7558) v_nondet_tree_~n~0.base_596 (_ bv12 32)) |c_#length|))) (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_7386 (_ BitVec 32)) (v_ArrVal_7385 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_575 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_575 v_ArrVal_7385) nondet_tree_~n~0.base v_ArrVal_7386) v_nondet_tree_~n~0.base_574 (_ bv12 32)))) (and (= .cse0 |c_#length|) (bvule (_ bv12 32) (select .cse0 nondet_tree_~n~0.base)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_575) (_ bv0 1)))))) is different from true [2022-11-19 07:32:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:01,420 INFO L93 Difference]: Finished difference Result 404 states and 577 transitions. [2022-11-19 07:32:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:32:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 16 states have call successors, (20), 3 states have call predecessors, (20), 10 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) Word has length 79 [2022-11-19 07:32:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:01,423 INFO L225 Difference]: With dead ends: 404 [2022-11-19 07:32:01,424 INFO L226 Difference]: Without dead ends: 404 [2022-11-19 07:32:01,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 217 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 18 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=100, Invalid=201, Unknown=43, NotChecked=846, Total=1190 [2022-11-19 07:32:01,425 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 178 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 3692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3240 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:01,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 408 Invalid, 3692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 409 Invalid, 0 Unknown, 3240 Unchecked, 1.0s Time] [2022-11-19 07:32:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-19 07:32:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 398. [2022-11-19 07:32:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 257 states have (on average 1.350194552529183) internal successors, (347), 310 states have internal predecessors, (347), 55 states have call successors, (55), 23 states have call predecessors, (55), 35 states have return successors, (170), 64 states have call predecessors, (170), 55 states have call successors, (170) [2022-11-19 07:32:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 572 transitions. [2022-11-19 07:32:01,440 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 572 transitions. Word has length 79 [2022-11-19 07:32:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:01,440 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 572 transitions. [2022-11-19 07:32:01,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 16 states have call successors, (20), 3 states have call predecessors, (20), 10 states have return successors, (20), 13 states have call predecessors, (20), 16 states have call successors, (20) [2022-11-19 07:32:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 572 transitions. [2022-11-19 07:32:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:32:01,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:01,442 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1] [2022-11-19 07:32:01,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:01,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:01,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-11-19 07:32:02,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:02,060 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:32:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash 634863524, now seen corresponding path program 4 times [2022-11-19 07:32:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:32:02,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774778056] [2022-11-19 07:32:02,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:32:02,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:32:02,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:32:02,062 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:32:02,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-19 07:32:02,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:32:02,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:32:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:32:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:02,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:32:02,952 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7898 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7898) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:32:02,974 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7899 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7899) |c_#valid|)) is different from true [2022-11-19 07:32:02,988 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:32:03,038 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7899 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:32:03,090 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base)))))) is different from true [2022-11-19 07:32:05,417 INFO L321 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2022-11-19 07:32:05,417 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 5 case distinctions, treesize of input 39 treesize of output 66 [2022-11-19 07:32:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 55 not checked. [2022-11-19 07:32:05,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:07,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:32:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774778056] [2022-11-19 07:32:07,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774778056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [130521294] [2022-11-19 07:32:07,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:32:07,741 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:32:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:32:07,742 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:32:07,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-19 07:32:09,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:32:09,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:32:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:32:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:09,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:32:09,144 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8062 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8062) |c_#valid|)) is different from true [2022-11-19 07:32:09,161 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8063 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8063) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:32:13,551 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8062 (_ BitVec 1)) (v_ArrVal_8063 (_ BitVec 1)) (v_nondet_tree_~n~0.base_658 (_ BitVec 32)) (v_nondet_tree_~n~0.base_659 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8062))) (and (= (store (store .cse0 v_nondet_tree_~n~0.base_658 v_ArrVal_8063) v_nondet_tree_~n~0.base_659 (_ bv1 1)) |c_#valid|) (= (select .cse0 v_nondet_tree_~n~0.base_658) (_ bv0 1))))) is different from true [2022-11-19 07:32:21,779 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8062 (_ BitVec 1)) (v_ArrVal_8063 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_658 (_ BitVec 32)) (v_nondet_tree_~n~0.base_659 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8062))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_658)) (= |c_#valid| (store (store .cse0 v_nondet_tree_~n~0.base_658 v_ArrVal_8063) v_nondet_tree_~n~0.base_659 (_ bv1 1)))))) is different from true [2022-11-19 07:32:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:21,940 INFO L321 Elim1Store]: treesize reduction 82, result has 34.4 percent of original size [2022-11-19 07:32:21,940 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 5 case distinctions, treesize of input 38 treesize of output 71 [2022-11-19 07:32:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 55 not checked. [2022-11-19 07:32:21,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:22,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [130521294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:22,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779657] [2022-11-19 07:32:22,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:32:22,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:22,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:22,300 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:22,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-19 07:32:22,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:32:22,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:32:22,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:32:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:22,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:32:23,006 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8226 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8226) |c_#valid|)) is different from true [2022-11-19 07:32:23,022 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8227 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8227) |c_#valid|)) is different from true [2022-11-19 07:32:23,038 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8228 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8228) |c_#valid|)) is different from true [2022-11-19 07:32:29,178 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8227 (_ BitVec 1)) (v_nondet_tree_~n~0.base_679 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8227) v_nondet_tree_~n~0.base_679 (_ bv1 1)))) is different from true [2022-11-19 07:32:29,274 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_680 (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_ArrVal_8226 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8226) v_nondet_tree_~n~0.base_680 v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= .cse0 |c_#valid|) (= (bvadd (select .cse0 v_nondet_tree_~n~0.base_680) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-19 07:32:33,559 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_680 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_ArrVal_8226 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8226) v_nondet_tree_~n~0.base_680 v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= (_ bv0 1) (bvadd (select .cse0 v_nondet_tree_~n~0.base_680) (_ bv1 1))) (= .cse0 |c_#valid|)))) is different from true [2022-11-19 07:32:33,701 INFO L321 Elim1Store]: treesize reduction 94, result has 26.0 percent of original size [2022-11-19 07:32:33,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 136 [2022-11-19 07:32:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 107 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 60 not checked. [2022-11-19 07:32:33,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:34,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:34,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:34,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 24 [2022-11-19 07:32:34,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789724413] [2022-11-19 07:32:34,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:32:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:32:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:32:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=97, Unknown=29, NotChecked=510, Total=702 [2022-11-19 07:32:34,151 INFO L87 Difference]: Start difference. First operand 398 states and 572 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-19 07:32:39,851 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8228 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8228) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-19 07:32:51,980 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_nondet_tree_~n~0.base_680 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_ArrVal_8226 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8226) v_nondet_tree_~n~0.base_680 v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= (_ bv0 1) (bvadd (select .cse0 v_nondet_tree_~n~0.base_680) (_ bv1 1))) (= .cse0 |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= |c_#valid| .cse1) (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse1 nondet_tree_~n~0.base))))))) is different from true [2022-11-19 07:33:08,605 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8063 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_658 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_658) (_ bv0 1)) (= |c_#valid| (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_658 v_ArrVal_8063) nondet_tree_~n~0.base (_ bv1 1))))) (exists ((v_nondet_tree_~n~0.base_638 (_ BitVec 32)) (v_ArrVal_7898 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_638 v_ArrVal_7898) nondet_tree_~n~0.base v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_638)) (= .cse0 |c_#valid|) (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)))))) (exists ((v_nondet_tree_~n~0.base_680 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_ArrVal_8226 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse1 (store (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8226) v_nondet_tree_~n~0.base_680 v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse1 nondet_tree_~n~0.base) (_ bv1 1))) (= (_ bv0 1) (bvadd (select .cse1 v_nondet_tree_~n~0.base_680) (_ bv1 1))) (= .cse1 |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse2 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= |c_#valid| .cse2) (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse2 nondet_tree_~n~0.base))))))) is different from true [2022-11-19 07:33:16,928 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 47 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:33,932 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_638 (_ BitVec 32)) (v_ArrVal_7898 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_638 v_ArrVal_7898) nondet_tree_~n~0.base v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_638)) (= .cse0 |c_#valid|) (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)))))) (exists ((v_ArrVal_8062 (_ BitVec 1)) (v_ArrVal_8063 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_658 (_ BitVec 32)) (v_nondet_tree_~n~0.base_659 (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8062))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_658)) (= |c_#valid| (store (store .cse1 v_nondet_tree_~n~0.base_658 v_ArrVal_8063) v_nondet_tree_~n~0.base_659 (_ bv1 1)))))) (exists ((v_nondet_tree_~n~0.base_680 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7899 (_ BitVec 1)) (v_ArrVal_8226 (_ BitVec 1)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse2 (store (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8226) v_nondet_tree_~n~0.base_680 v_ArrVal_7899) v_nondet_tree_~n~0.base_637 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse2 nondet_tree_~n~0.base) (_ bv1 1))) (= (_ bv0 1) (bvadd (select .cse2 v_nondet_tree_~n~0.base_680) (_ bv1 1))) (= .cse2 |c_#valid|))))) is different from true [2022-11-19 07:33:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:34,144 INFO L93 Difference]: Finished difference Result 404 states and 578 transitions. [2022-11-19 07:33:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:33:34,145 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) Word has length 73 [2022-11-19 07:33:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:34,147 INFO L225 Difference]: With dead ends: 404 [2022-11-19 07:33:34,147 INFO L226 Difference]: Without dead ends: 404 [2022-11-19 07:33:34,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 203 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 86.4s TimeCoverageRelationStatistics Valid=122, Invalid=181, Unknown=45, NotChecked=912, Total=1260 [2022-11-19 07:33:34,148 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 91 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 3518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3267 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:34,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 338 Invalid, 3518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 236 Invalid, 0 Unknown, 3267 Unchecked, 0.6s Time] [2022-11-19 07:33:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-19 07:33:34,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2022-11-19 07:33:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 258 states have (on average 1.3527131782945736) internal successors, (349), 310 states have internal predecessors, (349), 55 states have call successors, (55), 23 states have call predecessors, (55), 35 states have return successors, (170), 65 states have call predecessors, (170), 55 states have call successors, (170) [2022-11-19 07:33:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 574 transitions. [2022-11-19 07:33:34,178 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 574 transitions. Word has length 73 [2022-11-19 07:33:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:34,178 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 574 transitions. [2022-11-19 07:33:34,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-19 07:33:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 574 transitions. [2022-11-19 07:33:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:33:34,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:34,180 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-19 07:33:34,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:34,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:34,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-19 07:33:34,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:33:34,795 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:33:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:34,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1410861583, now seen corresponding path program 4 times [2022-11-19 07:33:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:33:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921772452] [2022-11-19 07:33:34,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:33:34,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:33:34,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:33:34,797 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:33:34,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-19 07:33:35,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:33:35,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:33:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 07:33:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:35,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:33:35,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:33:35,620 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8365 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8365) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:35,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:33:35,725 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:35,834 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:33:35,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:33:35,847 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_700 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_700 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_700 nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:35,937 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8365 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_700 (_ BitVec 32)) (v_nondet_tree_~n~0.base_701 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_701)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_701 v_ArrVal_8365) v_nondet_tree_~n~0.base_700 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_700 nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:36,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:36,144 INFO L321 Elim1Store]: treesize reduction 53, result has 25.4 percent of original size [2022-11-19 07:33:36,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 31 [2022-11-19 07:33:36,165 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:33:36,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:33:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 63 not checked. [2022-11-19 07:33:36,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:36,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:33:40,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:33:40,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921772452] [2022-11-19 07:33:40,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921772452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:40,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1520298831] [2022-11-19 07:33:40,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:33:40,987 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:33:40,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:33:40,988 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:33:40,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-19 07:33:42,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:33:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:33:42,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:33:42,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:42,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:33:42,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:33:42,353 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8498 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8498))) (exists ((v_ArrVal_8499 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8499) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:42,390 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8500 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8500) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:42,420 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:33:42,487 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8500 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_721 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8500) v_nondet_tree_~n~0.base_721 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:42,573 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8498 (_ BitVec 32)) (v_ArrVal_8500 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_721 (_ BitVec 32)) (v_ArrVal_8499 (_ BitVec 1)) (v_nondet_tree_~n~0.base_722 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_722) (_ bv0 1)) (= |c_#length| (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_722 v_ArrVal_8498) nondet_tree_~n~0.base v_ArrVal_8500) v_nondet_tree_~n~0.base_721 (_ bv12 32))) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_722 v_ArrVal_8499) nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:42,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:42,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:42,795 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-19 07:33:42,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-11-19 07:33:42,859 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-19 07:33:42,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-19 07:33:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 66 not checked. [2022-11-19 07:33:42,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:45,408 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset))) (and (forall ((v_nondet_tree_~n~0.base_741 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_741))) (forall ((v_nondet_tree_~n~0.base_739 (_ BitVec 32)) (v_ArrVal_8512 (_ BitVec 1))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_741 v_ArrVal_8512) v_nondet_tree_~n~0.base_739))) (forall ((v_ArrVal_8513 (_ BitVec 32)) (v_ArrVal_8514 (_ BitVec 32)) (v_nondet_tree_~n~0.base_740 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_nondet_tree_~n~0.base_741 v_ArrVal_8514) v_nondet_tree_~n~0.base_739 v_ArrVal_8513) v_nondet_tree_~n~0.base_740 (_ bv12 32)) c_nondet_tree_~n~0.base))))))) (or (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse0) (forall ((v_nondet_tree_~n~0.base_739 (_ BitVec 32)) (v_ArrVal_8512 (_ BitVec 1)) (v_nondet_tree_~n~0.base_741 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_741))) (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_741 v_ArrVal_8512) v_nondet_tree_~n~0.base_739)))))))) is different from false [2022-11-19 07:33:45,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1520298831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:45,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688790723] [2022-11-19 07:33:45,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:33:45,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:45,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:45,419 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:45,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-19 07:33:46,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:33:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:33:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 07:33:46,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:46,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:33:46,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:33:46,351 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8640 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8640))) (exists ((v_ArrVal_8641 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8641) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:33:46,499 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8640 (_ BitVec 32)) (v_nondet_tree_~n~0.base_742 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8641 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_742)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_742 v_ArrVal_8641) nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_742 v_ArrVal_8640) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:33:46,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:46,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:46,916 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:33:46,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 07:33:47,011 INFO L321 Elim1Store]: treesize reduction 43, result has 29.5 percent of original size [2022-11-19 07:33:47,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 65 [2022-11-19 07:33:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 54 not checked. [2022-11-19 07:33:47,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:52,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688790723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:52,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:33:52,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 22 [2022-11-19 07:33:52,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176440218] [2022-11-19 07:33:52,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:33:52,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:33:52,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:33:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:33:52,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=177, Unknown=17, NotChecked=444, Total=702 [2022-11-19 07:33:52,210 INFO L87 Difference]: Start difference. First operand 399 states and 574 transitions. Second operand has 23 states, 22 states have (on average 3.5) internal successors, (77), 19 states have internal predecessors, (77), 16 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (19), 11 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-19 07:33:52,946 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:33:53,498 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8640 (_ BitVec 32)) (v_nondet_tree_~n~0.base_742 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8641 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_742)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_742 v_ArrVal_8641) nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_742 v_ArrVal_8640) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_700 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_700 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_700 nondet_tree_~n~0.base)))) (exists ((v_ArrVal_8500 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_721 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8500) v_nondet_tree_~n~0.base_721 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:33:53,509 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8640 (_ BitVec 32)) (v_nondet_tree_~n~0.base_742 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_743 (_ BitVec 32)) (v_ArrVal_8641 (_ BitVec 1))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_743 (_ bv1 1)))) (and (= (select .cse0 v_nondet_tree_~n~0.base_742) (_ bv0 1)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_743) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_743 (_ bv12 32)) v_nondet_tree_~n~0.base_742 v_ArrVal_8640) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (select (store .cse0 v_nondet_tree_~n~0.base_742 v_ArrVal_8641) nondet_tree_~n~0.base) (_ bv0 1))))) (exists ((v_ArrVal_8498 (_ BitVec 32)) (v_ArrVal_8500 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_721 (_ BitVec 32)) (v_ArrVal_8499 (_ BitVec 1)) (v_nondet_tree_~n~0.base_722 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_722) (_ bv0 1)) (= |c_#length| (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_722 v_ArrVal_8498) nondet_tree_~n~0.base v_ArrVal_8500) v_nondet_tree_~n~0.base_721 (_ bv12 32))) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_722 v_ArrVal_8499) nondet_tree_~n~0.base)))) (exists ((v_ArrVal_8365 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_700 (_ BitVec 32)) (v_nondet_tree_~n~0.base_701 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_701)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_701 v_ArrVal_8365) v_nondet_tree_~n~0.base_700 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_700 nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:33:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:53,733 INFO L93 Difference]: Finished difference Result 424 states and 616 transitions. [2022-11-19 07:33:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:33:53,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 19 states have internal predecessors, (77), 16 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (19), 11 states have call predecessors, (19), 15 states have call successors, (19) Word has length 57 [2022-11-19 07:33:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:53,736 INFO L225 Difference]: With dead ends: 424 [2022-11-19 07:33:53,736 INFO L226 Difference]: Without dead ends: 424 [2022-11-19 07:33:53,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=100, Invalid=246, Unknown=20, NotChecked=690, Total=1056 [2022-11-19 07:33:53,737 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 176 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 3351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3034 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:53,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 426 Invalid, 3351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 275 Invalid, 0 Unknown, 3034 Unchecked, 0.7s Time] [2022-11-19 07:33:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-19 07:33:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 420. [2022-11-19 07:33:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 273 states have (on average 1.3296703296703296) internal successors, (363), 325 states have internal predecessors, (363), 58 states have call successors, (58), 23 states have call predecessors, (58), 38 states have return successors, (191), 71 states have call predecessors, (191), 58 states have call successors, (191) [2022-11-19 07:33:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 612 transitions. [2022-11-19 07:33:53,752 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 612 transitions. Word has length 57 [2022-11-19 07:33:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:53,752 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 612 transitions. [2022-11-19 07:33:53,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 19 states have internal predecessors, (77), 16 states have call successors, (19), 3 states have call predecessors, (19), 9 states have return successors, (19), 11 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-19 07:33:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 612 transitions. [2022-11-19 07:33:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 07:33:53,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:53,754 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 07:33:53,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:53,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:54,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:54,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:54,370 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:33:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash -313154347, now seen corresponding path program 4 times [2022-11-19 07:33:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:33:54,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415737420] [2022-11-19 07:33:54,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:33:54,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:33:54,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:33:54,372 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:33:54,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-19 07:33:55,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:33:55,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:33:55,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:33:55,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:55,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:33:55,265 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_8815 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8815))))) is different from true [2022-11-19 07:33:55,289 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8816 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8816))) is different from true [2022-11-19 07:33:55,305 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-19 07:33:55,355 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8816 (_ BitVec 1)) (v_nondet_tree_~n~0.base_763 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8816) v_nondet_tree_~n~0.base_763 (_ bv1 1)))) is different from true [2022-11-19 07:33:55,438 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8816 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_763 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8816) v_nondet_tree_~n~0.base_763 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base)))))) is different from true [2022-11-19 07:33:57,782 INFO L321 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2022-11-19 07:33:57,782 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 5 case distinctions, treesize of input 39 treesize of output 66 [2022-11-19 07:33:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 63 not checked. [2022-11-19 07:33:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:00,131 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:34:00,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415737420] [2022-11-19 07:34:00,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415737420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:00,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648456576] [2022-11-19 07:34:00,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:34:00,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:34:00,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:34:00,132 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:34:00,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-19 07:34:01,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:34:01,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:01,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:34:01,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:01,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:34:01,666 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8985 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8985))) is different from true [2022-11-19 07:34:01,683 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8986 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8986) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:34:05,883 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8985 (_ BitVec 1)) (v_nondet_tree_~n~0.base_784 (_ BitVec 32)) (v_nondet_tree_~n~0.base_785 (_ BitVec 32)) (v_ArrVal_8986 (_ BitVec 1))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8985))) (and (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_785)) (= (store (store .cse0 v_nondet_tree_~n~0.base_785 v_ArrVal_8986) v_nondet_tree_~n~0.base_784 (_ bv1 1)) |c_#valid|)))) is different from true [2022-11-19 07:34:14,045 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8985 (_ BitVec 1)) (v_nondet_tree_~n~0.base_784 (_ BitVec 32)) (v_nondet_tree_~n~0.base_785 (_ BitVec 32)) (v_ArrVal_8986 (_ BitVec 1))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8985))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= |c_#valid| (store (store .cse0 v_nondet_tree_~n~0.base_785 v_ArrVal_8986) v_nondet_tree_~n~0.base_784 (_ bv1 1))) (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_785))))) is different from true [2022-11-19 07:34:14,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:14,201 INFO L321 Elim1Store]: treesize reduction 82, result has 34.4 percent of original size [2022-11-19 07:34:14,202 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 5 case distinctions, treesize of input 38 treesize of output 71 [2022-11-19 07:34:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 63 not checked. [2022-11-19 07:34:14,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:14,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648456576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:14,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253055801] [2022-11-19 07:34:14,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:34:14,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:14,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:14,634 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:14,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-19 07:34:15,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:34:15,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:34:15,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:15,413 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9154 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9154))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:34:15,435 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9155 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9155))) is different from true [2022-11-19 07:34:15,449 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9156 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9156))) is different from true [2022-11-19 07:34:21,586 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9155 (_ BitVec 1)) (v_nondet_tree_~n~0.base_805 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9155) v_nondet_tree_~n~0.base_805 (_ bv1 1)))) is different from true [2022-11-19 07:34:23,925 INFO L321 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2022-11-19 07:34:23,925 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 5 case distinctions, treesize of input 39 treesize of output 66 [2022-11-19 07:34:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 136 proven. 21 refuted. 0 times theorem prover too weak. 68 trivial. 42 not checked. [2022-11-19 07:34:23,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:24,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253055801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:24,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:34:24,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 21 [2022-11-19 07:34:24,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648856993] [2022-11-19 07:34:24,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:24,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:34:24,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:34:24,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:34:24,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=83, Unknown=25, NotChecked=390, Total=552 [2022-11-19 07:34:24,572 INFO L87 Difference]: Start difference. First operand 420 states and 612 transitions. Second operand has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 19 states have internal predecessors, (70), 15 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (18), 11 states have call predecessors, (18), 15 states have call successors, (18) [2022-11-19 07:34:43,034 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_8816 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_763 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8816) v_nondet_tree_~n~0.base_763 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base))))))) is different from true [2022-11-19 07:34:43,431 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_784 (_ BitVec 32)) (v_ArrVal_8986 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8986) v_nondet_tree_~n~0.base_784 (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_9155 (_ BitVec 1)) (v_nondet_tree_~n~0.base_805 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9155) v_nondet_tree_~n~0.base_805 (_ bv1 1)))) (exists ((v_ArrVal_8815 (_ BitVec 1)) (v_ArrVal_8816 (_ BitVec 1)) (v_nondet_tree_~n~0.base_764 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_763 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_764 v_ArrVal_8815) nondet_tree_~n~0.base v_ArrVal_8816) v_nondet_tree_~n~0.base_763 (_ bv1 1)))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_764)) (= |c_#valid| .cse0) (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) (exists ((v_ArrVal_8816 (_ BitVec 1)) (v_nondet_tree_~n~0.base_763 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8816) v_nondet_tree_~n~0.base_763 (_ bv1 1))))) is different from true [2022-11-19 07:34:53,543 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_784 (_ BitVec 32)) (v_ArrVal_8986 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8986) v_nondet_tree_~n~0.base_784 (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_8815 (_ BitVec 1)) (v_ArrVal_8816 (_ BitVec 1)) (v_nondet_tree_~n~0.base_764 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_763 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_764 v_ArrVal_8815) nondet_tree_~n~0.base v_ArrVal_8816) v_nondet_tree_~n~0.base_763 (_ bv1 1)))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_764)) (= |c_#valid| .cse0) (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) (exists ((v_ArrVal_8816 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_763 (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8816) v_nondet_tree_~n~0.base_763 (_ bv1 1)))) (and (= |c_#valid| .cse1) (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse1 nondet_tree_~n~0.base))))))) is different from true [2022-11-19 07:36:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:21,942 INFO L93 Difference]: Finished difference Result 428 states and 620 transitions. [2022-11-19 07:36:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:36:21,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 19 states have internal predecessors, (70), 15 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (18), 11 states have call predecessors, (18), 15 states have call successors, (18) Word has length 79 [2022-11-19 07:36:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:21,945 INFO L225 Difference]: With dead ends: 428 [2022-11-19 07:36:21,945 INFO L226 Difference]: Without dead ends: 428 [2022-11-19 07:36:21,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 223 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 16 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 141.6s TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=64, NotChecked=752, Total=1122 [2022-11-19 07:36:21,946 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 93 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 3370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3118 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:21,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 487 Invalid, 3370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 237 Invalid, 0 Unknown, 3118 Unchecked, 0.6s Time] [2022-11-19 07:36:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-19 07:36:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 419. [2022-11-19 07:36:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 272 states have (on average 1.3272058823529411) internal successors, (361), 325 states have internal predecessors, (361), 58 states have call successors, (58), 23 states have call predecessors, (58), 38 states have return successors, (191), 70 states have call predecessors, (191), 58 states have call successors, (191) [2022-11-19 07:36:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 610 transitions. [2022-11-19 07:36:21,959 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 610 transitions. Word has length 79 [2022-11-19 07:36:21,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:21,959 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 610 transitions. [2022-11-19 07:36:21,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 19 states have internal predecessors, (70), 15 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (18), 11 states have call predecessors, (18), 15 states have call successors, (18) [2022-11-19 07:36:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 610 transitions. [2022-11-19 07:36:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:36:21,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:21,961 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:21,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:22,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:22,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2022-11-19 07:36:22,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:22,577 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:36:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1592442388, now seen corresponding path program 3 times [2022-11-19 07:36:22,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:22,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540859830] [2022-11-19 07:36:22,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:36:22,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:22,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:22,579 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:36:22,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-19 07:36:23,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:36:23,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 07:36:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:23,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:36:23,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:36:23,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:36:23,719 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9234 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_9234))) (exists ((v_ArrVal_9235 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_9235) |c_#memory_$Pointer$.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:36:23,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:36:23,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:36:23,771 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:36:23,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:36:23,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:36:23,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:36:24,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-19 07:36:24,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-19 07:36:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-11-19 07:36:24,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:26,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:26,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540859830] [2022-11-19 07:36:26,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540859830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:26,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713652497] [2022-11-19 07:36:26,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:36:26,574 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:26,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:36:26,575 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:36:26,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-19 07:36:27,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:36:27,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:36:27,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:27,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:36:27,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:36:28,585 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-19 07:36:28,596 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-19 07:36:28,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-11-19 07:36:28,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-11-19 07:36:28,798 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select v_arrayElimArr_4 (_ bv4 32)) (_ bv0 32)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| c_nondet_tree_~n~0.base v_arrayElimArr_4)))) (exists ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (store |c_old(#memory_$Pointer$.base)| c_nondet_tree_~n~0.base v_arrayElimArr_3) |c_#memory_$Pointer$.base|) (= (select v_arrayElimArr_3 (_ bv4 32)) (_ bv0 32))))) is different from true [2022-11-19 07:36:28,819 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select v_arrayElimArr_3 (_ bv4 32)) (_ bv0 32)) (= (store |c_old(#memory_$Pointer$.base)| |c_nondet_tree_#res.base| v_arrayElimArr_3) |c_#memory_$Pointer$.base|))) (exists ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (store |c_old(#memory_$Pointer$.offset)| |c_nondet_tree_#res.base| v_arrayElimArr_4) |c_#memory_$Pointer$.offset|) (= (select v_arrayElimArr_4 (_ bv4 32)) (_ bv0 32))))) is different from true [2022-11-19 07:36:28,863 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:36:28,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-19 07:36:28,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 07:36:28,912 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:36:28,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-19 07:36:28,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 07:36:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:29,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:29,111 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:36:29,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-19 07:36:29,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:29,129 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-19 07:36:29,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-11-19 07:36:30,214 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:36:30,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 20 [2022-11-19 07:36:30,224 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:36:30,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 10 [2022-11-19 07:36:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-11-19 07:36:30,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:37,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:36:37,371 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-11-19 07:36:37,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:36:37,409 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-11-19 07:36:37,450 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset))) (and (forall ((|v_nondet_tree_#t~ret9.base_983| (_ BitVec 32)) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |v_nondet_tree_#t~ret9.base_983| v_arrayElimArr_6) c_nondet_tree_~n~0.base) .cse0) (_ bv0 32)) (not (= (select v_arrayElimArr_6 (_ bv4 32)) (_ bv0 32))))) (forall ((|v_nondet_tree_#t~ret9.base_983| (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_nondet_tree_#t~ret9.base_983| v_arrayElimArr_5) c_nondet_tree_~n~0.base) .cse0) (_ bv0 32)) (not (= (select v_arrayElimArr_5 (_ bv4 32)) (_ bv0 32))))))) is different from false [2022-11-19 07:36:37,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1713652497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:37,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44862532] [2022-11-19 07:36:37,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:36:37,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:37,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:37,457 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:37,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-19 07:36:39,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:36:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:39,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-19 07:36:39,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:39,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:36:39,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:36:39,481 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9480 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_9480))) (exists ((v_ArrVal_9479 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_9479))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:36:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:36:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:36:39,548 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:36:39,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:36:39,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:36:39,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:36:40,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:36:40,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:36:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-11-19 07:36:40,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:42,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44862532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:42,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:36:42,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 20] total 46 [2022-11-19 07:36:42,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648444587] [2022-11-19 07:36:42,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:42,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:36:42,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:36:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1661, Unknown=20, NotChecked=430, Total=2256 [2022-11-19 07:36:42,344 INFO L87 Difference]: Start difference. First operand 419 states and 610 transitions. Second operand has 46 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 33 states have internal predecessors, (71), 13 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-19 07:36:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:52,620 INFO L93 Difference]: Finished difference Result 490 states and 708 transitions. [2022-11-19 07:36:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 07:36:52,621 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 33 states have internal predecessors, (71), 13 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) Word has length 45 [2022-11-19 07:36:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:52,624 INFO L225 Difference]: With dead ends: 490 [2022-11-19 07:36:52,624 INFO L226 Difference]: Without dead ends: 490 [2022-11-19 07:36:52,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=393, Invalid=4286, Unknown=33, NotChecked=690, Total=5402 [2022-11-19 07:36:52,625 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 238 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 3520 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 5042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1444 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:52,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 2521 Invalid, 5042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3520 Invalid, 0 Unknown, 1444 Unchecked, 7.7s Time] [2022-11-19 07:36:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-19 07:36:52,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 439. [2022-11-19 07:36:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 287 states have (on average 1.3170731707317074) internal successors, (378), 340 states have internal predecessors, (378), 61 states have call successors, (61), 25 states have call predecessors, (61), 40 states have return successors, (194), 73 states have call predecessors, (194), 61 states have call successors, (194) [2022-11-19 07:36:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 633 transitions. [2022-11-19 07:36:52,641 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 633 transitions. Word has length 45 [2022-11-19 07:36:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:52,641 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 633 transitions. [2022-11-19 07:36:52,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 33 states have internal predecessors, (71), 13 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-19 07:36:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 633 transitions. [2022-11-19 07:36:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 07:36:52,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:52,644 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1] [2022-11-19 07:36:52,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:52,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-19 07:36:53,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:53,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:53,256 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:36:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:53,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1321656234, now seen corresponding path program 5 times [2022-11-19 07:36:53,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:53,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868907408] [2022-11-19 07:36:53,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:36:53,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:53,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:53,258 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:36:53,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-19 07:36:54,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-19 07:36:54,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:36:54,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:54,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:36:54,863 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9698 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9698))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:36:54,893 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_9698 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9698)))) is different from true [2022-11-19 07:36:54,916 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9699 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9699))) is different from true [2022-11-19 07:37:01,364 INFO L321 Elim1Store]: treesize reduction 123, result has 21.7 percent of original size [2022-11-19 07:37:01,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 56 [2022-11-19 07:37:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 146 proven. 34 refuted. 4 times theorem prover too weak. 66 trivial. 28 not checked. [2022-11-19 07:37:01,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:05,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:05,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868907408] [2022-11-19 07:37:05,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868907408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:37:05,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2083145567] [2022-11-19 07:37:05,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:37:05,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:37:05,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:37:05,735 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:37:05,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-19 07:37:07,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:37:07,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011172481] [2022-11-19 07:37:07,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:37:07,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:07,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:37:07,290 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:37:07,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-19 07:37:07,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (101)] Forceful destruction successful, exit code 1 [2022-11-19 07:38:48,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-19 07:38:48,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:38:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:38:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:48,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:38:49,166 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_10065 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_10065) |c_#valid|)))) is different from true [2022-11-19 07:38:49,209 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10065 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_10065) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:38:55,166 INFO L321 Elim1Store]: treesize reduction 153, result has 18.2 percent of original size [2022-11-19 07:38:55,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 47 treesize of output 67 [2022-11-19 07:38:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 146 proven. 28 refuted. 0 times theorem prover too weak. 72 trivial. 32 not checked. [2022-11-19 07:38:55,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:39:05,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011172481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:05,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:39:05,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2022-11-19 07:39:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844692963] [2022-11-19 07:39:05,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:39:05,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:39:05,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:39:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:39:05,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=160, Unknown=19, NotChecked=150, Total=380 [2022-11-19 07:39:05,252 INFO L87 Difference]: Start difference. First operand 439 states and 633 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 9 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (15), 12 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:39:13,338 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_9699 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9699))) (exists ((v_ArrVal_10065 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_10065) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_9698 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9698))))) is different from true [2022-11-19 07:39:13,341 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_9699 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9699))) (exists ((v_ArrVal_10065 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_10065) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:39:13,346 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_9699 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9699))))) (exists ((v_ArrVal_10065 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_10065) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-19 07:39:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:13,684 INFO L93 Difference]: Finished difference Result 448 states and 664 transitions. [2022-11-19 07:39:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:39:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 9 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (15), 12 states have call predecessors, (15), 9 states have call successors, (15) Word has length 81 [2022-11-19 07:39:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:13,687 INFO L225 Difference]: With dead ends: 448 [2022-11-19 07:39:13,687 INFO L226 Difference]: Without dead ends: 448 [2022-11-19 07:39:13,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=66, Invalid=182, Unknown=24, NotChecked=280, Total=552 [2022-11-19 07:39:13,688 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 88 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1542 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:13,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 550 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 117 Invalid, 0 Unknown, 1542 Unchecked, 0.3s Time] [2022-11-19 07:39:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-19 07:39:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 444. [2022-11-19 07:39:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 291 states have (on average 1.3161512027491409) internal successors, (383), 343 states have internal predecessors, (383), 61 states have call successors, (61), 25 states have call predecessors, (61), 41 states have return successors, (216), 75 states have call predecessors, (216), 61 states have call successors, (216) [2022-11-19 07:39:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 660 transitions. [2022-11-19 07:39:13,704 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 660 transitions. Word has length 81 [2022-11-19 07:39:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:13,705 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 660 transitions. [2022-11-19 07:39:13,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 9 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (15), 12 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:39:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 660 transitions. [2022-11-19 07:39:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:39:13,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:13,707 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1] [2022-11-19 07:39:13,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:13,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:14,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:39:14,123 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-19 07:39:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1110125721, now seen corresponding path program 5 times [2022-11-19 07:39:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:39:14,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527562429] [2022-11-19 07:39:14,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:39:14,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:39:14,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:39:14,126 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:39:14,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-19 07:39:15,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-19 07:39:15,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:39:15,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:39:15,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:15,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:39:15,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:39:15,915 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10258 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_10258) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:39:15,965 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_10260 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_10260))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:39:16,019 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10260 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_10260)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-19 07:39:16,046 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-19 07:39:16,108 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10260 (_ BitVec 32)) (v_nondet_tree_~n~0.base_906 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_10260) v_nondet_tree_~n~0.base_906 (_ bv12 32)) |c_#length|))) is different from true [2022-11-19 07:39:16,161 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10258 (_ BitVec 32)) (v_ArrVal_10260 (_ BitVec 32)) (v_nondet_tree_~n~0.base_906 (_ BitVec 32)) (v_nondet_tree_~n~0.base_907 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_907)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_10258) v_nondet_tree_~n~0.base_907 v_ArrVal_10260) v_nondet_tree_~n~0.base_906 (_ bv12 32))))) is different from true [2022-11-19 07:39:16,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:39:16,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:39:16,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:39:16,301 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 07:39:16,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 32 [2022-11-19 07:39:16,343 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-19 07:39:16,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:39:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 177 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 63 not checked. [2022-11-19 07:39:16,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:39:18,957 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:39:18,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527562429] [2022-11-19 07:39:18,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527562429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:18,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [398783191] [2022-11-19 07:39:18,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:39:18,957 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:39:18,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:39:18,958 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:39:18,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-19 07:39:20,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:39:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227955267] [2022-11-19 07:39:20,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:39:20,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:20,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:20,648 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:20,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-19 07:39:20,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6481d42-f9f2-4c6c-8ee2-46fe9d6c762c/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (104)] Forceful destruction successful, exit code 1