./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:18:46,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:18:46,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:18:46,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:18:46,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:18:46,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:18:46,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:18:46,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:18:46,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:18:46,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:18:46,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:18:46,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:18:46,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:18:46,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:18:46,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:18:46,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:18:46,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:18:46,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:18:46,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:18:46,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:18:46,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:18:46,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:18:46,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:18:46,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:18:46,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:18:46,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:18:46,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:18:46,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:18:46,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:18:46,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:18:46,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:18:46,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:18:46,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:18:46,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:18:46,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:18:46,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:18:46,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:18:46,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:18:46,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:18:46,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:18:46,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:18:46,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-12-14 10:18:46,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:18:46,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:18:46,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:18:46,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:18:46,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:18:46,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:18:46,404 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:18:46,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:18:46,404 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:18:46,404 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:18:46,404 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:18:46,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:18:46,405 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:18:46,405 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:18:46,405 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:18:46,405 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:18:46,405 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:18:46,405 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:18:46,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:18:46,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:18:46,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:18:46,406 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:18:46,406 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:18:46,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:18:46,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:18:46,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:18:46,407 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:18:46,407 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:18:46,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:18:46,407 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:18:46,407 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:18:46,408 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:18:46,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:18:46,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:18:46,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:18:46,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:18:46,408 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:18:46,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:18:46,409 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:18:46,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:18:46,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:18:46,409 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_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe [2022-12-14 10:18:46,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:18:46,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:18:46,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:18:46,606 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:18:46,606 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:18:46,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/verifythis/tree_del_iter.c [2022-12-14 10:18:49,223 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:18:49,367 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:18:49,368 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/sv-benchmarks/c/verifythis/tree_del_iter.c [2022-12-14 10:18:49,374 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/data/e145560b7/e80fe5b705c94941b9165505be30029c/FLAG3ffe562b2 [2022-12-14 10:18:49,385 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/data/e145560b7/e80fe5b705c94941b9165505be30029c [2022-12-14 10:18:49,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:18:49,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:18:49,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:18:49,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:18:49,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:18:49,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:18:49" (1/1) ... [2022-12-14 10:18:49,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76510d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:49, skipping insertion in model container [2022-12-14 10:18:49,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:18:49" (1/1) ... [2022-12-14 10:18:49,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:18:49,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:18:49,534 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2022-12-14 10:18:49,548 WARN L1576 CHandler]: Possible shadowing of function min [2022-12-14 10:18:49,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:18:49,567 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 10:18:49,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b3a77ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:49, skipping insertion in model container [2022-12-14 10:18:49,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:18:49,568 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 10:18:49,569 INFO L158 Benchmark]: Toolchain (without parser) took 180.38ms. Allocated memory is still 130.0MB. Free memory was 91.3MB in the beginning and 81.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 10:18:49,569 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 130.0MB. Free memory is still 102.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:18:49,570 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.27ms. Allocated memory is still 130.0MB. Free memory was 91.3MB in the beginning and 81.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 10:18:49,571 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 130.0MB. Free memory is still 102.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.27ms. Allocated memory is still 130.0MB. Free memory was 91.3MB in the beginning and 81.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. 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_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:18:50,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:18:50,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:18:50,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:18:50,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:18:50,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:18:50,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:18:50,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:18:50,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:18:50,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:18:50,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:18:50,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:18:50,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:18:50,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:18:50,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:18:50,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:18:50,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:18:50,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:18:50,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:18:50,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:18:50,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:18:50,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:18:50,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:18:50,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:18:50,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:18:50,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:18:50,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:18:50,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:18:50,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:18:50,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:18:50,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:18:50,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:18:50,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:18:50,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:18:50,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:18:50,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:18:50,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:18:50,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:18:50,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:18:50,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:18:50,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:18:50,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2022-12-14 10:18:50,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:18:50,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:18:50,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:18:50,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:18:50,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:18:50,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:18:50,967 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:18:50,968 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:18:50,968 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:18:50,968 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:18:50,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:18:50,968 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:18:50,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:18:50,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:18:50,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:18:50,969 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:18:50,969 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:18:50,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:18:50,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:18:50,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:18:50,969 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:18:50,970 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:18:50,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:18:50,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:18:50,970 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 10:18:50,970 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 10:18:50,970 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:18:50,970 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:18:50,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:18:50,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 10:18:50,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:18:50,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:18:50,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:18:50,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:18:50,971 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 10:18:50,971 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 10:18:50,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:18:50,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 10:18:50,972 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_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe [2022-12-14 10:18:51,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:18:51,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:18:51,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:18:51,196 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:18:51,197 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:18:51,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/verifythis/tree_del_iter.c [2022-12-14 10:18:53,814 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:18:53,973 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:18:53,973 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/sv-benchmarks/c/verifythis/tree_del_iter.c [2022-12-14 10:18:53,978 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/data/da8053f89/df5b38308de54affbdbad70e515886f2/FLAG3d3750528 [2022-12-14 10:18:53,989 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/data/da8053f89/df5b38308de54affbdbad70e515886f2 [2022-12-14 10:18:53,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:18:53,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:18:53,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:18:53,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:18:53,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:18:53,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:18:53" (1/1) ... [2022-12-14 10:18:53,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15453886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:53, skipping insertion in model container [2022-12-14 10:18:53,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:18:53" (1/1) ... [2022-12-14 10:18:54,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:18:54,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:18:54,118 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2022-12-14 10:18:54,134 WARN L1576 CHandler]: Possible shadowing of function min [2022-12-14 10:18:54,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:18:54,166 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 10:18:54,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:18:54,175 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2022-12-14 10:18:54,184 WARN L1576 CHandler]: Possible shadowing of function min [2022-12-14 10:18:54,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:18:54,200 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:18:54,210 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2022-12-14 10:18:54,216 WARN L1576 CHandler]: Possible shadowing of function min [2022-12-14 10:18:54,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:18:54,241 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:18:54,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54 WrapperNode [2022-12-14 10:18:54,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:18:54,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:18:54,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:18:54,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:18:54,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,286 INFO L138 Inliner]: procedures = 31, calls = 64, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2022-12-14 10:18:54,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:18:54,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:18:54,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:18:54,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:18:54,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,320 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:18:54,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:18:54,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:18:54,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:18:54,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (1/1) ... [2022-12-14 10:18:54,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:18:54,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:54,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:18:54,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:18:54,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:18:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 10:18:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:18:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 10:18:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-12-14 10:18:54,388 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-12-14 10:18:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 10:18:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-12-14 10:18:54,388 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-12-14 10:18:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 10:18:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-12-14 10:18:54,389 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-12-14 10:18:54,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:18:54,389 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-12-14 10:18:54,389 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-12-14 10:18:54,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:18:54,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:18:54,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 10:18:54,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 10:18:54,389 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-12-14 10:18:54,389 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-12-14 10:18:54,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:18:54,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 10:18:54,493 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:18:54,494 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:18:55,019 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:18:55,027 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:18:55,027 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 10:18:55,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:18:55 BoogieIcfgContainer [2022-12-14 10:18:55,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:18:55,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:18:55,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:18:55,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:18:55,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:18:53" (1/3) ... [2022-12-14 10:18:55,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6343506a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:18:55, skipping insertion in model container [2022-12-14 10:18:55,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:18:54" (2/3) ... [2022-12-14 10:18:55,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6343506a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:18:55, skipping insertion in model container [2022-12-14 10:18:55,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:18:55" (3/3) ... [2022-12-14 10:18:55,038 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2022-12-14 10:18:55,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:18:55,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-12-14 10:18:55,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:18:55,089 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;@3c3ddda3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:18:55,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-12-14 10:18:55,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 99 states have (on average 1.797979797979798) internal successors, (178), 163 states have internal predecessors, (178), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 10:18:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:18:55,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:55,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:18:55,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:18:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:55,113 INFO L85 PathProgramCache]: Analyzing trace with hash 88048840, now seen corresponding path program 1 times [2022-12-14 10:18:55,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:18:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723702647] [2022-12-14 10:18:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:55,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:18:55,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:18:55,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 10:18:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:55,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:18:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:55,234 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 7 [2022-12-14 10:18:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:55,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:18:55,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:18:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723702647] [2022-12-14 10:18:55,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723702647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:18:55,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:18:55,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:18:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707360623] [2022-12-14 10:18:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:18:55,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:18:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:18:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:18:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:18:55,274 INFO L87 Difference]: Start difference. First operand has 190 states, 99 states have (on average 1.797979797979798) internal successors, (178), 163 states have internal predecessors, (178), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) 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) [2022-12-14 10:18:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:55,509 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2022-12-14 10:18:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:18:55,511 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 [2022-12-14 10:18:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:55,521 INFO L225 Difference]: With dead ends: 191 [2022-12-14 10:18:55,521 INFO L226 Difference]: Without dead ends: 188 [2022-12-14 10:18:55,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:18:55,526 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:55,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 350 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:18:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-14 10:18:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-12-14 10:18:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 97 states have (on average 1.731958762886598) internal successors, (168), 159 states have internal predecessors, (168), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 10:18:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2022-12-14 10:18:55,568 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 5 [2022-12-14 10:18:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:55,569 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2022-12-14 10:18:55,569 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) [2022-12-14 10:18:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2022-12-14 10:18:55,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:18:55,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:55,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:18:55,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:18:55,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:55,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:18:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash 88048841, now seen corresponding path program 1 times [2022-12-14 10:18:55,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:18:55,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448692435] [2022-12-14 10:18:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:55,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:55,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:18:55,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:18:55,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 10:18:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:18:55,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:55,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:18:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:55,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:18:55,952 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:18:55,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448692435] [2022-12-14 10:18:55,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448692435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:18:55,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:18:55,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:18:55,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822438167] [2022-12-14 10:18:55,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:18:55,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:18:55,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:18:55,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:18:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:18:55,954 INFO L87 Difference]: Start difference. First operand 186 states and 208 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) [2022-12-14 10:18:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:56,221 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2022-12-14 10:18:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:18:56,222 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 [2022-12-14 10:18:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:56,224 INFO L225 Difference]: With dead ends: 185 [2022-12-14 10:18:56,224 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 10:18:56,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:18:56,225 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:56,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 353 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:18:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 10:18:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-12-14 10:18:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 97 states have (on average 1.7216494845360826) internal successors, (167), 158 states have internal predecessors, (167), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 10:18:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2022-12-14 10:18:56,241 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 5 [2022-12-14 10:18:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:56,242 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2022-12-14 10:18:56,242 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) [2022-12-14 10:18:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2022-12-14 10:18:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:18:56,243 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:56,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:18:56,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 10:18:56,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:56,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:18:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash -163614216, now seen corresponding path program 1 times [2022-12-14 10:18:56,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:18:56,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138315198] [2022-12-14 10:18:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:56,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:56,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:18:56,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:18:56,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 10:18:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:18:56,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:56,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:18:56,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:18:56,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138315198] [2022-12-14 10:18:56,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138315198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:18:56,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:18:56,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:18:56,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074247687] [2022-12-14 10:18:56,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:18:56,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:18:56,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:18:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:18:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:18:56,680 INFO L87 Difference]: Start difference. First operand 185 states and 207 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) [2022-12-14 10:18:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:56,844 INFO L93 Difference]: Finished difference Result 297 states and 335 transitions. [2022-12-14 10:18:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:18:56,845 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 [2022-12-14 10:18:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:56,848 INFO L225 Difference]: With dead ends: 297 [2022-12-14 10:18:56,848 INFO L226 Difference]: Without dead ends: 297 [2022-12-14 10:18:56,848 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 [2022-12-14 10:18:56,849 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 193 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:56,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1221 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:18:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-14 10:18:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 193. [2022-12-14 10:18:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 102 states have (on average 1.6862745098039216) internal successors, (172), 164 states have internal predecessors, (172), 21 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (24), 21 states have call predecessors, (24), 21 states have call successors, (24) [2022-12-14 10:18:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 217 transitions. [2022-12-14 10:18:56,859 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 217 transitions. Word has length 11 [2022-12-14 10:18:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:56,859 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 217 transitions. [2022-12-14 10:18:56,859 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) [2022-12-14 10:18:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 217 transitions. [2022-12-14 10:18:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:18:56,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:56,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:18:56,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 10:18:57,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:57,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:18:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash -916126343, now seen corresponding path program 1 times [2022-12-14 10:18:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:18:57,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313246856] [2022-12-14 10:18:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:57,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:18:57,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:18:57,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 10:18:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:57,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:18:57,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:57,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:18:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:57,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:18:57,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:18:57,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313246856] [2022-12-14 10:18:57,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313246856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:18:57,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:18:57,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:18:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090735311] [2022-12-14 10:18:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:18:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:18:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:18:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:18:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:18:57,179 INFO L87 Difference]: Start difference. First operand 193 states and 217 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) [2022-12-14 10:18:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:57,589 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2022-12-14 10:18:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:18:57,590 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 [2022-12-14 10:18:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:57,591 INFO L225 Difference]: With dead ends: 197 [2022-12-14 10:18:57,591 INFO L226 Difference]: Without dead ends: 197 [2022-12-14 10:18:57,591 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 [2022-12-14 10:18:57,592 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 70 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:57,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 264 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:18:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-14 10:18:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-12-14 10:18:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 104 states have (on average 1.6923076923076923) internal successors, (176), 164 states have internal predecessors, (176), 21 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2022-12-14 10:18:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 221 transitions. [2022-12-14 10:18:57,598 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 221 transitions. Word has length 11 [2022-12-14 10:18:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:57,599 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 221 transitions. [2022-12-14 10:18:57,599 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) [2022-12-14 10:18:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 221 transitions. [2022-12-14 10:18:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:18:57,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:57,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:18:57,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-12-14 10:18:57,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:57,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:18:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash -916126342, now seen corresponding path program 1 times [2022-12-14 10:18:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:18:57,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406235245] [2022-12-14 10:18:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:57,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:18:57,808 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:18:57,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 10:18:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:57,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:18:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:57,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:18:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:57,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:18:57,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:18:57,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406235245] [2022-12-14 10:18:57,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406235245] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:18:57,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:18:57,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:18:57,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067039010] [2022-12-14 10:18:57,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:18:57,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:18:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:18:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:18:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:18:57,980 INFO L87 Difference]: Start difference. First operand 195 states and 221 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) [2022-12-14 10:18:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:58,428 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2022-12-14 10:18:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:18:58,429 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 [2022-12-14 10:18:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:58,430 INFO L225 Difference]: With dead ends: 201 [2022-12-14 10:18:58,430 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 10:18:58,430 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 [2022-12-14 10:18:58,431 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 68 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 291 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:18:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 10:18:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-12-14 10:18:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 106 states have (on average 1.669811320754717) internal successors, (177), 166 states have internal predecessors, (177), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (26), 24 states have call predecessors, (26), 22 states have call successors, (26) [2022-12-14 10:18:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 225 transitions. [2022-12-14 10:18:58,441 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 225 transitions. Word has length 11 [2022-12-14 10:18:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:58,441 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 225 transitions. [2022-12-14 10:18:58,441 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) [2022-12-14 10:18:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 225 transitions. [2022-12-14 10:18:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 10:18:58,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:58,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:18:58,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 10:18:58,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:58,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:18:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1497511222, now seen corresponding path program 1 times [2022-12-14 10:18:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:18:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172340840] [2022-12-14 10:18:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:58,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:18:58,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:18:58,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 10:18:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:58,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:18:58,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:58,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:18:58,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:18:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172340840] [2022-12-14 10:18:58,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172340840] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:18:58,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:18:58,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:18:58,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555250633] [2022-12-14 10:18:58,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:18:58,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:18:58,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:18:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:18:58,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:18:58,797 INFO L87 Difference]: Start difference. First operand 198 states and 225 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) [2022-12-14 10:18:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:58,910 INFO L93 Difference]: Finished difference Result 306 states and 347 transitions. [2022-12-14 10:18:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:18:58,911 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 [2022-12-14 10:18:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:58,912 INFO L225 Difference]: With dead ends: 306 [2022-12-14 10:18:58,912 INFO L226 Difference]: Without dead ends: 306 [2022-12-14 10:18:58,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:18:58,913 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 192 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:58,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1220 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:18:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-12-14 10:18:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 244. [2022-12-14 10:18:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 145 states have (on average 1.696551724137931) internal successors, (246), 205 states have internal predecessors, (246), 28 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (32), 30 states have call predecessors, (32), 28 states have call successors, (32) [2022-12-14 10:18:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 306 transitions. [2022-12-14 10:18:58,921 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 306 transitions. Word has length 17 [2022-12-14 10:18:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:58,921 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 306 transitions. [2022-12-14 10:18:58,921 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) [2022-12-14 10:18:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 306 transitions. [2022-12-14 10:18:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 10:18:58,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:58,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:18:58,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 10:18:59,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:59,123 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:18:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:59,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2030552348, now seen corresponding path program 1 times [2022-12-14 10:18:59,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:18:59,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323136510] [2022-12-14 10:18:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:59,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:18:59,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:18:59,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:18:59,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 10:18:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:59,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:18:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:59,278 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 7 [2022-12-14 10:18:59,309 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 [2022-12-14 10:18:59,337 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 [2022-12-14 10:18:59,403 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 10:18:59,404 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 [2022-12-14 10:18:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-12-14 10:18:59,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:18:59,534 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:18:59,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323136510] [2022-12-14 10:18:59,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323136510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:18:59,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [423297416] [2022-12-14 10:18:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:59,535 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:18:59,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:18:59,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:18:59,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 10:18:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:59,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:18:59,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:59,757 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 7 [2022-12-14 10:18:59,772 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 [2022-12-14 10:18:59,817 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:18:59,817 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 [2022-12-14 10:18:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-12-14 10:18:59,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:18:59,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [423297416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:18:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023538900] [2022-12-14 10:18:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:59,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:59,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:18:59,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:19:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:19:00,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:00,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:19:00,047 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 [2022-12-14 10:19:00,137 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:19:00,138 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 [2022-12-14 10:19:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2022-12-14 10:19:00,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:00,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023538900] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:00,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:00,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-12-14 10:19:00,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524762288] [2022-12-14 10:19:00,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:00,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:19:00,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:00,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:19:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=4, NotChecked=44, Total=90 [2022-12-14 10:19:00,236 INFO L87 Difference]: Start difference. First operand 244 states and 306 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) [2022-12-14 10:19:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:07,096 INFO L93 Difference]: Finished difference Result 275 states and 346 transitions. [2022-12-14 10:19:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:19:07,097 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 [2022-12-14 10:19:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:07,098 INFO L225 Difference]: With dead ends: 275 [2022-12-14 10:19:07,098 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 10:19:07,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=35, Invalid=49, Unknown=4, NotChecked=68, Total=156 [2022-12-14 10:19:07,098 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 119 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 52 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 941 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:07,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 333 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 430 Invalid, 13 Unknown, 941 Unchecked, 0.8s Time] [2022-12-14 10:19:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 10:19:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 263. [2022-12-14 10:19:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 219 states have internal predecessors, (265), 28 states have call successors, (28), 12 states have call predecessors, (28), 14 states have return successors, (42), 31 states have call predecessors, (42), 28 states have call successors, (42) [2022-12-14 10:19:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 335 transitions. [2022-12-14 10:19:07,106 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 335 transitions. Word has length 29 [2022-12-14 10:19:07,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:07,106 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 335 transitions. [2022-12-14 10:19:07,106 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) [2022-12-14 10:19:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 335 transitions. [2022-12-14 10:19:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:19:07,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:07,107 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:19:07,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 10:19:07,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 10:19:07,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:19:07,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:07,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2119118034, now seen corresponding path program 1 times [2022-12-14 10:19:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:07,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251575938] [2022-12-14 10:19:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:07,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:07,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:07,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 10:19:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:07,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:19:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:07,922 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 5 [2022-12-14 10:19:07,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:19:07,959 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 [2022-12-14 10:19:07,990 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 [2022-12-14 10:19:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:08,029 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 [2022-12-14 10:19:08,037 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:19:08,037 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 [2022-12-14 10:19:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-12-14 10:19:08,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:08,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:08,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251575938] [2022-12-14 10:19:08,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251575938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:08,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553406373] [2022-12-14 10:19:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:08,225 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:19:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:19:08,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:19:08,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 10:19:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:08,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:19:08,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:08,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:08,380 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 7 [2022-12-14 10:19:08,407 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 [2022-12-14 10:19:08,429 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 [2022-12-14 10:19:08,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:08,476 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 [2022-12-14 10:19:08,482 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:19:08,482 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 [2022-12-14 10:19:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-12-14 10:19:08,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:10,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553406373] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267732063] [2022-12-14 10:19:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:10,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:10,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:10,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:10,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:19:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:19:10,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:10,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:10,716 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 [2022-12-14 10:19:10,757 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 10:19:10,758 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 [2022-12-14 10:19:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 8 not checked. [2022-12-14 10:19:10,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:10,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267732063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:10,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:10,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 10 [2022-12-14 10:19:10,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139094102] [2022-12-14 10:19:10,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:10,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:19:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:19:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=54, Unknown=5, NotChecked=90, Total=182 [2022-12-14 10:19:10,973 INFO L87 Difference]: Start difference. First operand 263 states and 335 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) [2022-12-14 10:19:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:11,827 INFO L93 Difference]: Finished difference Result 270 states and 348 transitions. [2022-12-14 10:19:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:19:11,828 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 [2022-12-14 10:19:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:11,830 INFO L225 Difference]: With dead ends: 270 [2022-12-14 10:19:11,830 INFO L226 Difference]: Without dead ends: 270 [2022-12-14 10:19:11,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=40, Invalid=65, Unknown=5, NotChecked=100, Total=210 [2022-12-14 10:19:11,831 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 130 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1104 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:11,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 350 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 420 Invalid, 0 Unknown, 1104 Unchecked, 0.8s Time] [2022-12-14 10:19:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-12-14 10:19:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2022-12-14 10:19:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 161 states have (on average 1.6521739130434783) internal successors, (266), 221 states have internal predecessors, (266), 29 states have call successors, (29), 12 states have call predecessors, (29), 14 states have return successors, (45), 32 states have call predecessors, (45), 29 states have call successors, (45) [2022-12-14 10:19:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2022-12-14 10:19:11,840 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 25 [2022-12-14 10:19:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:11,840 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2022-12-14 10:19:11,840 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) [2022-12-14 10:19:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2022-12-14 10:19:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:19:11,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:11,840 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] [2022-12-14 10:19:11,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:12,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:19:12,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 10:19:12,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:12,443 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash -599064084, now seen corresponding path program 1 times [2022-12-14 10:19:12,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:12,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873449623] [2022-12-14 10:19:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:12,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:12,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:12,448 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:12,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 10:19:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:12,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:19:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:12,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:19:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:12,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:12,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:12,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873449623] [2022-12-14 10:19:12,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873449623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:12,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [394628350] [2022-12-14 10:19:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:12,784 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:19:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:19:12,785 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:19:12,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 10:19:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:19:12,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:12,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:19:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:12,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:13,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [394628350] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:13,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205153921] [2022-12-14 10:19:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:13,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:13,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:13,092 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:13,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:19:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:19:13,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:19:13,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:19:13,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205153921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:13,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:19:13,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2022-12-14 10:19:13,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317362293] [2022-12-14 10:19:13,288 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:13,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:19:13,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:19:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:19:13,288 INFO L87 Difference]: Start difference. First operand 266 states and 340 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) [2022-12-14 10:19:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:14,591 INFO L93 Difference]: Finished difference Result 301 states and 359 transitions. [2022-12-14 10:19:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:19:14,592 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 [2022-12-14 10:19:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:14,593 INFO L225 Difference]: With dead ends: 301 [2022-12-14 10:19:14,593 INFO L226 Difference]: Without dead ends: 301 [2022-12-14 10:19:14,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:19:14,593 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 299 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:14,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 810 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:19:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-12-14 10:19:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 271. [2022-12-14 10:19:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 168 states have (on average 1.625) internal successors, (273), 225 states have internal predecessors, (273), 31 states have call successors, (31), 12 states have call predecessors, (31), 14 states have return successors, (46), 33 states have call predecessors, (46), 31 states have call successors, (46) [2022-12-14 10:19:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 350 transitions. [2022-12-14 10:19:14,600 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 350 transitions. Word has length 25 [2022-12-14 10:19:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:14,600 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 350 transitions. [2022-12-14 10:19:14,600 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) [2022-12-14 10:19:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 350 transitions. [2022-12-14 10:19:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:19:14,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:14,601 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] [2022-12-14 10:19:14,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 10:19:14,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 10:19:15,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 10:19:15,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:15,204 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:15,205 INFO L85 PathProgramCache]: Analyzing trace with hash -599064083, now seen corresponding path program 1 times [2022-12-14 10:19:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:15,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534177815] [2022-12-14 10:19:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:15,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:15,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:15,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 10:19:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:19:15,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:15,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:15,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:16,374 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534177815] [2022-12-14 10:19:16,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534177815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [833352019] [2022-12-14 10:19:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:16,374 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:19:16,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:19:16,375 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:19:16,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 10:19:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:16,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:19:16,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:16,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:16,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:17,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [833352019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723978049] [2022-12-14 10:19:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:17,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:17,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:17,476 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:17,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 10:19:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:17,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:19:17,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:17,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:17,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:19,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723978049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:19,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:19:19,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2022-12-14 10:19:19,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117206860] [2022-12-14 10:19:19,054 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:19,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:19:19,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:19,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:19:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:19:19,056 INFO L87 Difference]: Start difference. First operand 271 states and 350 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) [2022-12-14 10:19:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:22,889 INFO L93 Difference]: Finished difference Result 296 states and 387 transitions. [2022-12-14 10:19:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:19:22,890 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 [2022-12-14 10:19:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:22,892 INFO L225 Difference]: With dead ends: 296 [2022-12-14 10:19:22,892 INFO L226 Difference]: Without dead ends: 296 [2022-12-14 10:19:22,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:19:22,893 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 182 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:22,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1047 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 10:19:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-14 10:19:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 287. [2022-12-14 10:19:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 180 states have (on average 1.6) internal successors, (288), 237 states have internal predecessors, (288), 34 states have call successors, (34), 13 states have call predecessors, (34), 15 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2022-12-14 10:19:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 371 transitions. [2022-12-14 10:19:22,899 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 371 transitions. Word has length 25 [2022-12-14 10:19:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:22,900 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 371 transitions. [2022-12-14 10:19:22,900 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) [2022-12-14 10:19:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 371 transitions. [2022-12-14 10:19:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 10:19:22,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:22,900 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] [2022-12-14 10:19:22,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 10:19:23,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:23,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:23,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:23,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting tree_inorderErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1805510171, now seen corresponding path program 1 times [2022-12-14 10:19:23,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:23,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856592330] [2022-12-14 10:19:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:23,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:23,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:23,506 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:23,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 10:19:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:23,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:19:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:19:23,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:19:23,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856592330] [2022-12-14 10:19:23,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856592330] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:19:23,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:19:23,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:19:23,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066352615] [2022-12-14 10:19:23,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:19:23,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:19:23,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:23,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:19:23,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:19:23,677 INFO L87 Difference]: Start difference. First operand 287 states and 371 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) [2022-12-14 10:19:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:23,697 INFO L93 Difference]: Finished difference Result 253 states and 300 transitions. [2022-12-14 10:19:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:19:23,697 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 [2022-12-14 10:19:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:23,698 INFO L225 Difference]: With dead ends: 253 [2022-12-14 10:19:23,698 INFO L226 Difference]: Without dead ends: 235 [2022-12-14 10:19:23,698 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 [2022-12-14 10:19:23,699 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 0 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 800 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 [2022-12-14 10:19:23,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 800 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:19:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-12-14 10:19:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-12-14 10:19:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 137 states have (on average 1.562043795620438) internal successors, (214), 194 states have internal predecessors, (214), 27 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2022-12-14 10:19:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2022-12-14 10:19:23,706 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 30 [2022-12-14 10:19:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:23,706 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2022-12-14 10:19:23,707 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) [2022-12-14 10:19:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2022-12-14 10:19:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 10:19:23,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:23,708 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] [2022-12-14 10:19:23,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 10:19:23,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:23,908 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:23,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1626172482, now seen corresponding path program 1 times [2022-12-14 10:19:23,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:23,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374211514] [2022-12-14 10:19:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:23,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:23,910 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:23,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 10:19:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:19:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:19:24,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:19:24,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374211514] [2022-12-14 10:19:24,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374211514] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:19:24,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:19:24,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:19:24,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864650503] [2022-12-14 10:19:24,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:19:24,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:19:24,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:24,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:19:24,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:19:24,040 INFO L87 Difference]: Start difference. First operand 235 states and 282 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) [2022-12-14 10:19:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:24,240 INFO L93 Difference]: Finished difference Result 241 states and 291 transitions. [2022-12-14 10:19:24,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:19:24,241 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 [2022-12-14 10:19:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:24,243 INFO L225 Difference]: With dead ends: 241 [2022-12-14 10:19:24,243 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 10:19:24,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:19:24,244 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 209 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:24,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1036 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:19:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 10:19:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2022-12-14 10:19:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 137 states have (on average 1.5474452554744527) internal successors, (212), 194 states have internal predecessors, (212), 27 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2022-12-14 10:19:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 280 transitions. [2022-12-14 10:19:24,249 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 280 transitions. Word has length 31 [2022-12-14 10:19:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:24,249 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 280 transitions. [2022-12-14 10:19:24,249 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) [2022-12-14 10:19:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 280 transitions. [2022-12-14 10:19:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 10:19:24,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:24,249 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] [2022-12-14 10:19:24,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:24,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:24,450 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash -575590880, now seen corresponding path program 1 times [2022-12-14 10:19:24,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238088055] [2022-12-14 10:19:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:24,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:24,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:24,451 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:24,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 10:19:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 10:19:24,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:24,613 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 [2022-12-14 10:19:24,618 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 [2022-12-14 10:19:24,667 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 [2022-12-14 10:19:24,674 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 [2022-12-14 10:19:24,836 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 [2022-12-14 10:19:24,838 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 15 treesize of output 7 [2022-12-14 10:19:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:19:24,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:19:26,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238088055] [2022-12-14 10:19:26,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238088055] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2128148695] [2022-12-14 10:19:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:26,194 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:19:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:19:26,195 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:19:26,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 10:19:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:26,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 10:19:26,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:26,414 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 [2022-12-14 10:19:26,419 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 [2022-12-14 10:19:26,463 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 [2022-12-14 10:19:26,468 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 [2022-12-14 10:19:26,534 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 [2022-12-14 10:19:26,538 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 [2022-12-14 10:19:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:19:26,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:19:27,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2128148695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:27,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251999242] [2022-12-14 10:19:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:27,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:27,259 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:27,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 10:19:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 10:19:27,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:27,363 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 [2022-12-14 10:19:27,368 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 [2022-12-14 10:19:27,405 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 [2022-12-14 10:19:27,410 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 [2022-12-14 10:19:27,468 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 [2022-12-14 10:19:27,472 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 [2022-12-14 10:19:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:19:27,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:19:28,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251999242] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:28,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:19:28,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 14] total 23 [2022-12-14 10:19:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773921190] [2022-12-14 10:19:28,191 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:19:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:19:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:19:28,192 INFO L87 Difference]: Start difference. First operand 235 states and 280 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) [2022-12-14 10:19:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:30,638 INFO L93 Difference]: Finished difference Result 312 states and 368 transitions. [2022-12-14 10:19:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:19:30,639 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 [2022-12-14 10:19:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:30,640 INFO L225 Difference]: With dead ends: 312 [2022-12-14 10:19:30,640 INFO L226 Difference]: Without dead ends: 312 [2022-12-14 10:19:30,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:19:30,640 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 290 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:30,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 2210 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 10:19:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-14 10:19:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 241. [2022-12-14 10:19:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 141 states have (on average 1.5319148936170213) internal successors, (216), 199 states have internal predecessors, (216), 27 states have call successors, (27), 12 states have call predecessors, (27), 15 states have return successors, (43), 29 states have call predecessors, (43), 27 states have call successors, (43) [2022-12-14 10:19:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 286 transitions. [2022-12-14 10:19:30,646 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 286 transitions. Word has length 31 [2022-12-14 10:19:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:30,646 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 286 transitions. [2022-12-14 10:19:30,646 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) [2022-12-14 10:19:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 286 transitions. [2022-12-14 10:19:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 10:19:30,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:30,647 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 10:19:30,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:30,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:31,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 10:19:31,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:19:31,249 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1366807693, now seen corresponding path program 1 times [2022-12-14 10:19:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550642908] [2022-12-14 10:19:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:31,254 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:31,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 10:19:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 10:19:31,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:31,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:19:31,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:31,543 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_848 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_848))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:31,570 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_848 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_848)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:31,586 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 [2022-12-14 10:19:31,623 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_848 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_68 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_68)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_68 v_ArrVal_848) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-12-14 10:19:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:31,667 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-14 10:19:31,667 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 [2022-12-14 10:19:31,675 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:19:31,675 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 [2022-12-14 10:19:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 40 not checked. [2022-12-14 10:19:31,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:32,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550642908] [2022-12-14 10:19:32,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550642908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [649930811] [2022-12-14 10:19:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:32,006 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:19:32,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:19:32,007 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:19:32,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 10:19:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 10:19:32,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:32,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:19:32,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:32,374 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_937 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_937) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:32,396 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_937 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_937) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:32,445 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_937 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_79 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_937) v_nondet_tree_~n~0.base_79 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:32,489 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-14 10:19:32,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-12-14 10:19:32,499 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:19:32,499 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 [2022-12-14 10:19:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 40 not checked. [2022-12-14 10:19:32,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [649930811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825925869] [2022-12-14 10:19:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:32,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:32,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:32,863 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:32,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 10:19:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:19:32,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:32,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:33,043 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1026 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1026))) (exists ((v_ArrVal_1025 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1025))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:33,077 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1025 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1026 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1026)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1025)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:33,104 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1027 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1027))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:33,126 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1027 (_ 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_1027)))) is different from true [2022-12-14 10:19:33,180 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_90 (_ BitVec 32)) (v_ArrVal_1025 (_ BitVec 32)) (v_ArrVal_1027 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1026 (_ BitVec 1))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1025) v_nondet_tree_~n~0.base_90 v_ArrVal_1027) |c_#length|) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1026) v_nondet_tree_~n~0.base_90) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:33,251 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:19:33,251 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 [2022-12-14 10:19:33,290 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-14 10:19:33,290 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 [2022-12-14 10:19:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 40 not checked. [2022-12-14 10:19:33,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:35,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825925869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:35,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:35,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-12-14 10:19:35,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134805854] [2022-12-14 10:19:35,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:35,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:19:35,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:35,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:19:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=62, Unknown=12, NotChecked=300, Total=420 [2022-12-14 10:19:35,892 INFO L87 Difference]: Start difference. First operand 241 states and 286 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2022-12-14 10:19:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:46,884 INFO L93 Difference]: Finished difference Result 254 states and 312 transitions. [2022-12-14 10:19:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:19:46,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 45 [2022-12-14 10:19:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:46,886 INFO L225 Difference]: With dead ends: 254 [2022-12-14 10:19:46,886 INFO L226 Difference]: Without dead ends: 254 [2022-12-14 10:19:46,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=73, Invalid=113, Unknown=18, NotChecked=396, Total=600 [2022-12-14 10:19:46,887 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 68 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 3236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2699 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:46,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 397 Invalid, 3236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 515 Invalid, 0 Unknown, 2699 Unchecked, 0.9s Time] [2022-12-14 10:19:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-12-14 10:19:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-12-14 10:19:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 144 states have (on average 1.5208333333333333) internal successors, (219), 202 states have internal predecessors, (219), 27 states have call successors, (27), 12 states have call predecessors, (27), 16 states have return successors, (48), 30 states have call predecessors, (48), 27 states have call successors, (48) [2022-12-14 10:19:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 294 transitions. [2022-12-14 10:19:46,892 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 294 transitions. Word has length 45 [2022-12-14 10:19:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:46,892 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 294 transitions. [2022-12-14 10:19:46,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2022-12-14 10:19:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 294 transitions. [2022-12-14 10:19:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 10:19:46,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:46,892 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 10:19:46,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 10:19:47,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:47,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 10:19:47,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:47,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:47,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1441349863, now seen corresponding path program 2 times [2022-12-14 10:19:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:47,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440426744] [2022-12-14 10:19:47,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:19:47,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:19:47,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:47,500 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:47,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 10:19:47,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:19:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:19:47,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:47,764 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 7 [2022-12-14 10:19:47,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:47,804 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1134 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1134) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:47,828 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 [2022-12-14 10:19:47,877 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_101 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1134 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1134) v_nondet_tree_~n~0.base_101 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:47,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:47,963 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-14 10:19:47,963 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 [2022-12-14 10:19:47,979 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:19:47,979 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 [2022-12-14 10:19:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 30 not checked. [2022-12-14 10:19:48,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:48,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440426744] [2022-12-14 10:19:48,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440426744] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [554431615] [2022-12-14 10:19:48,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:19:48,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:19:48,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:19:48,269 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:19:48,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 10:19:48,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:19:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:48,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:19:48,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:48,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:19:48,557 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 [2022-12-14 10:19:48,584 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1234 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1234))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:48,640 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1234 (_ BitVec 32)) (v_nondet_tree_~n~0.base_112 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1234) v_nondet_tree_~n~0.base_112 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:48,716 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-14 10:19:48,716 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 [2022-12-14 10:19:48,726 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:19:48,726 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 [2022-12-14 10:19:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 30 not checked. [2022-12-14 10:19:48,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:49,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [554431615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:49,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483115196] [2022-12-14 10:19:49,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:19:49,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:49,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:49,941 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:49,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 10:19:50,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:19:50,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:19:50,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:50,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:19:50,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:19:50,119 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 [2022-12-14 10:19:50,176 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_123 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_123 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:19:50,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:19:50,251 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-12-14 10:19:50,251 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 19 [2022-12-14 10:19:50,264 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:19:50,264 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 [2022-12-14 10:19:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 30 not checked. [2022-12-14 10:19:50,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:56,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483115196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:56,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:19:56,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-12-14 10:19:56,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439439509] [2022-12-14 10:19:56,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:56,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:19:56,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:56,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:19:56,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=67, Unknown=10, NotChecked=154, Total=272 [2022-12-14 10:19:56,567 INFO L87 Difference]: Start difference. First operand 245 states and 294 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 9 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 10:19:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:58,377 INFO L93 Difference]: Finished difference Result 264 states and 339 transitions. [2022-12-14 10:19:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:19:58,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 9 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) Word has length 43 [2022-12-14 10:19:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:58,379 INFO L225 Difference]: With dead ends: 264 [2022-12-14 10:19:58,379 INFO L226 Difference]: Without dead ends: 264 [2022-12-14 10:19:58,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=79, Invalid=146, Unknown=13, NotChecked=224, Total=462 [2022-12-14 10:19:58,380 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 77 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1743 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:58,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 501 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 715 Invalid, 0 Unknown, 1743 Unchecked, 1.3s Time] [2022-12-14 10:19:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-14 10:19:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2022-12-14 10:19:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 151 states have (on average 1.4966887417218544) internal successors, (226), 209 states have internal predecessors, (226), 29 states have call successors, (29), 12 states have call predecessors, (29), 17 states have return successors, (63), 33 states have call predecessors, (63), 29 states have call successors, (63) [2022-12-14 10:19:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 318 transitions. [2022-12-14 10:19:58,390 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 318 transitions. Word has length 43 [2022-12-14 10:19:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:58,390 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 318 transitions. [2022-12-14 10:19:58,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 9 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 10:19:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 318 transitions. [2022-12-14 10:19:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 10:19:58,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:58,391 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] [2022-12-14 10:19:58,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 10:19:58,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-12-14 10:19:58,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:58,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:58,993 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:19:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:58,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1591520033, now seen corresponding path program 2 times [2022-12-14 10:19:58,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:19:58,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22556845] [2022-12-14 10:19:58,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:19:58,996 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 [2022-12-14 10:19:58,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:19:58,997 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:19:58,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 10:19:59,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:19:59,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:19:59,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:19:59,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:59,806 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 [2022-12-14 10:19:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:19:59,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:19:59,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22556845] [2022-12-14 10:19:59,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22556845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:59,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926470457] [2022-12-14 10:19:59,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:19:59,938 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:19:59,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:19:59,939 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:19:59,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 10:20:00,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:20:00,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:20:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:20:00,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:00,399 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 [2022-12-14 10:20:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:20:00,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926470457] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:00,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740670547] [2022-12-14 10:20:00,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:20:00,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:00,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:00,476 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:00,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 10:20:00,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:20:00,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:00,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:20:00,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:20:00,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:00,803 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 [2022-12-14 10:20:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:20:00,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740670547] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:00,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:20:00,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2022-12-14 10:20:00,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755260495] [2022-12-14 10:20:00,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:20:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:20:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:20:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:20:00,874 INFO L87 Difference]: Start difference. First operand 255 states and 318 transitions. Second operand has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 10:20:02,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:02,902 INFO L93 Difference]: Finished difference Result 257 states and 321 transitions. [2022-12-14 10:20:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:20:02,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 39 [2022-12-14 10:20:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:02,903 INFO L225 Difference]: With dead ends: 257 [2022-12-14 10:20:02,903 INFO L226 Difference]: Without dead ends: 257 [2022-12-14 10:20:02,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:20:02,904 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 70 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:02,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1306 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 10:20:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-12-14 10:20:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2022-12-14 10:20:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 151 states have (on average 1.4768211920529801) internal successors, (223), 209 states have internal predecessors, (223), 29 states have call successors, (29), 12 states have call predecessors, (29), 17 states have return successors, (63), 33 states have call predecessors, (63), 29 states have call successors, (63) [2022-12-14 10:20:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 315 transitions. [2022-12-14 10:20:02,910 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 315 transitions. Word has length 39 [2022-12-14 10:20:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:02,910 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 315 transitions. [2022-12-14 10:20:02,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 10:20:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 315 transitions. [2022-12-14 10:20:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:20:02,910 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:02,910 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 10:20:02,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-12-14 10:20:03,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 10:20:03,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-12-14 10:20:03,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:20:03,513 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:20:03,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:03,513 INFO L85 PathProgramCache]: Analyzing trace with hash -595289514, now seen corresponding path program 3 times [2022-12-14 10:20:03,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:20:03,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554073795] [2022-12-14 10:20:03,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:20:03,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:20:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:20:03,515 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:20:03,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 10:20:04,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:20:04,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:20:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:04,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:20:04,245 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1617 (_ BitVec 32)) (|nondet_tree_#t~ret9.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_1617) |nondet_tree_#t~ret9.base| (_ bv12 32))))) is different from true [2022-12-14 10:20:04,337 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1621 (_ BitVec 32)) (v_nondet_tree_~n~0.base_164 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1617 (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1617) v_nondet_tree_~n~0.base_164 v_ArrVal_1621) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|) (bvule (_ bv12 32) (select |c_#length| v_nondet_tree_~n~0.base_164)))) is different from true [2022-12-14 10:20:04,433 INFO L321 Elim1Store]: treesize reduction 75, result has 31.2 percent of original size [2022-12-14 10:20:04,433 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 18 treesize of output 42 [2022-12-14 10:20:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 33 refuted. 2 times theorem prover too weak. 39 trivial. 25 not checked. [2022-12-14 10:20:04,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:05,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:20:05,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554073795] [2022-12-14 10:20:05,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554073795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:05,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2011541914] [2022-12-14 10:20:05,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:20:05,236 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:20:05,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:20:05,237 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:20:05,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 10:20:05,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:20:05,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:05,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 10:20:05,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:05,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:20:05,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:20:05,805 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1739 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1739))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:20:05,829 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1739 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1739)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:20:05,932 WARN L859 $PredicateComparison]: unable to prove that (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (= (store (store |c_old(#length)| c_nondet_tree_~n~0.base (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|)) is different from true [2022-12-14 10:20:05,937 WARN L859 $PredicateComparison]: unable to prove that (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (= (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 [2022-12-14 10:20:05,950 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1739 (_ BitVec 32)) (|v_nondet_tree_#t~ret9.base_240| (_ BitVec 32))) (and (= (_ 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_1739) |c_nondet_tree_#t~ret9.base| (_ bv12 32)) |v_nondet_tree_#t~ret9.base_240| (_ bv12 32))))) is different from true [2022-12-14 10:20:05,959 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_1739 (_ BitVec 32)) (|v_nondet_tree_#t~ret9.base_240| (_ BitVec 32))) (and (= |c_#length| (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1739) |nondet_tree_#t~ret9.base| (_ bv12 32)) |v_nondet_tree_#t~ret9.base_240| (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:20:05,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:20:06,032 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-12-14 10:20:06,032 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 18 treesize of output 31 [2022-12-14 10:20:06,047 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:20:06,047 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 [2022-12-14 10:20:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 33 trivial. 43 not checked. [2022-12-14 10:20:06,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:07,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2011541914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:07,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651875938] [2022-12-14 10:20:07,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:20:07,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:07,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:07,518 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:07,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 10:20:10,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:20:10,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:10,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 10:20:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:10,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:20:10,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:20:10,490 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1857 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1857) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:20:10,514 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1857 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1857) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:20:10,586 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 [2022-12-14 10:20:10,651 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:20:10,651 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 [2022-12-14 10:20:10,660 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_198 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_198 (_ bv12 32))) (not (= v_nondet_tree_~n~0.base_198 nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:20:10,695 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_199 (_ BitVec 32)) (v_ArrVal_1857 (_ BitVec 32)) (v_nondet_tree_~n~0.base_198 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_199 v_ArrVal_1857) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_198 (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_198 nondet_tree_~n~0.base)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_199) (_ bv0 1)))) is different from true [2022-12-14 10:20:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:20:10,775 INFO L321 Elim1Store]: treesize reduction 53, result has 25.4 percent of original size [2022-12-14 10:20:10,775 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 [2022-12-14 10:20:10,790 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:20:10,790 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 [2022-12-14 10:20:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 62 not checked. [2022-12-14 10:20:10,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:11,089 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 10:20:11,089 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 [2022-12-14 10:20:13,134 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_218 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_218))) (forall ((v_nondet_tree_~n~0.base_216 (_ BitVec 32)) (v_nondet_tree_~n~0.base_217 (_ BitVec 32))) (or (forall ((v_ArrVal_1864 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_nondet_tree_~n~0.base_218 v_ArrVal_1864) v_nondet_tree_~n~0.base_216 (_ bv12 32)) v_nondet_tree_~n~0.base_217 (_ bv12 32)) c_nondet_tree_~n~0.base))) (= v_nondet_tree_~n~0.base_216 v_nondet_tree_~n~0.base_217))))) (or (forall ((v_nondet_tree_~n~0.base_218 (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_218)))) (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse0)))) is different from false [2022-12-14 10:20:13,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651875938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:13,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:20:13,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 27 [2022-12-14 10:20:13,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42438872] [2022-12-14 10:20:13,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:13,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 10:20:13,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:20:13,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 10:20:13,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=259, Unknown=25, NotChecked=630, Total=992 [2022-12-14 10:20:13,143 INFO L87 Difference]: Start difference. First operand 255 states and 315 transitions. Second operand has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 21 states have internal predecessors, (64), 11 states have call successors, (14), 3 states have call predecessors, (14), 9 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 10:20:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:44,761 INFO L93 Difference]: Finished difference Result 292 states and 411 transitions. [2022-12-14 10:20:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:20:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 21 states have internal predecessors, (64), 11 states have call successors, (14), 3 states have call predecessors, (14), 9 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2022-12-14 10:20:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:44,763 INFO L225 Difference]: With dead ends: 292 [2022-12-14 10:20:44,763 INFO L226 Difference]: Without dead ends: 292 [2022-12-14 10:20:44,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=238, Invalid=711, Unknown=37, NotChecked=994, Total=1980 [2022-12-14 10:20:44,764 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 128 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 91 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 5050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 3275 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:44,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 843 Invalid, 5050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1653 Invalid, 31 Unknown, 3275 Unchecked, 8.2s Time] [2022-12-14 10:20:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-12-14 10:20:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 272. [2022-12-14 10:20:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 163 states have (on average 1.4478527607361964) internal successors, (236), 222 states have internal predecessors, (236), 31 states have call successors, (31), 13 states have call predecessors, (31), 20 states have return successors, (82), 36 states have call predecessors, (82), 31 states have call successors, (82) [2022-12-14 10:20:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 349 transitions. [2022-12-14 10:20:44,771 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 349 transitions. Word has length 53 [2022-12-14 10:20:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:44,771 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 349 transitions. [2022-12-14 10:20:44,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 21 states have internal predecessors, (64), 11 states have call successors, (14), 3 states have call predecessors, (14), 9 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 10:20:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 349 transitions. [2022-12-14 10:20:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 10:20:44,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:44,772 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] [2022-12-14 10:20:44,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-12-14 10:20:44,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 10:20:45,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-14 10:20:45,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:45,374 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:20:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:45,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1971504767, now seen corresponding path program 1 times [2022-12-14 10:20:45,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:20:45,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558452309] [2022-12-14 10:20:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:45,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:20:45,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:20:45,378 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:20:45,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 10:20:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:45,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:20:45,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:45,560 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 [2022-12-14 10:20:45,567 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 [2022-12-14 10:20:45,910 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 [2022-12-14 10:20:45,914 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 [2022-12-14 10:20:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:20:46,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:20:46,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:20:46,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558452309] [2022-12-14 10:20:46,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558452309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:46,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1309597082] [2022-12-14 10:20:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:46,264 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:20:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:20:46,265 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:20:46,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 10:20:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 10:20:46,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:46,585 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 [2022-12-14 10:20:46,590 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 [2022-12-14 10:20:47,072 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 [2022-12-14 10:20:47,074 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 [2022-12-14 10:20:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:20:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:20:47,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1309597082] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488915425] [2022-12-14 10:20:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:47,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:47,333 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:47,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 10:20:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:47,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 10:20:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:47,488 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 [2022-12-14 10:20:47,494 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 [2022-12-14 10:20:47,758 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 [2022-12-14 10:20:47,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:20:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:20:47,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:20:48,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488915425] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:48,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:20:48,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15, 13, 15, 13] total 23 [2022-12-14 10:20:48,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350871095] [2022-12-14 10:20:48,053 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:48,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:20:48,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:20:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:20:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:20:48,054 INFO L87 Difference]: Start difference. First operand 272 states and 349 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) [2022-12-14 10:20:50,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:20:52,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:20:55,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:20:58,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:21:00,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:21:02,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:21:04,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:21:06,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:21:08,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:21:10,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:21:13,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:21:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:13,240 INFO L93 Difference]: Finished difference Result 451 states and 572 transitions. [2022-12-14 10:21:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 10:21:13,241 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 [2022-12-14 10:21:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:13,242 INFO L225 Difference]: With dead ends: 451 [2022-12-14 10:21:13,242 INFO L226 Difference]: Without dead ends: 449 [2022-12-14 10:21:13,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:21:13,243 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 292 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 61 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2673 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:13,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2673 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 756 Invalid, 11 Unknown, 0 Unchecked, 24.8s Time] [2022-12-14 10:21:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-12-14 10:21:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 364. [2022-12-14 10:21:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 229 states have (on average 1.4279475982532752) internal successors, (327), 288 states have internal predecessors, (327), 45 states have call successors, (45), 24 states have call predecessors, (45), 32 states have return successors, (121), 51 states have call predecessors, (121), 45 states have call successors, (121) [2022-12-14 10:21:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 493 transitions. [2022-12-14 10:21:13,255 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 493 transitions. Word has length 38 [2022-12-14 10:21:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:13,256 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 493 transitions. [2022-12-14 10:21:13,256 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) [2022-12-14 10:21:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 493 transitions. [2022-12-14 10:21:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 10:21:13,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:13,257 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] [2022-12-14 10:21:13,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 10:21:13,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 10:21:13,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:13,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:21:13,859 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:21:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:13,859 INFO L85 PathProgramCache]: Analyzing trace with hash 727982164, now seen corresponding path program 2 times [2022-12-14 10:21:13,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:21:13,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875142507] [2022-12-14 10:21:13,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:21:13,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:21:13,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:21:13,860 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:21:13,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 10:21:14,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:21:14,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:14,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 10:21:14,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:14,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:21:14,147 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 [2022-12-14 10:21:14,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:21:14,374 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2044 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_2044) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_2043 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_2043))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:14,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:14,405 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 [2022-12-14 10:21:14,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:14,416 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 [2022-12-14 10:21:14,430 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:21:14,430 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 [2022-12-14 10:21:14,470 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 [2022-12-14 10:21:14,476 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 [2022-12-14 10:21:14,727 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 [2022-12-14 10:21:14,729 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 [2022-12-14 10:21:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-12-14 10:21:14,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:16,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:21:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875142507] [2022-12-14 10:21:16,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875142507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1716860876] [2022-12-14 10:21:16,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:21:16,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:21:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:21:16,703 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:21:16,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 10:21:16,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:21:16,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 10:21:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:16,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:21:17,035 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 [2022-12-14 10:21:17,040 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 [2022-12-14 10:21:17,200 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2156 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_2156) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_2155 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_2155))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:17,236 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 [2022-12-14 10:21:17,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:17,245 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 [2022-12-14 10:21:17,255 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:21:17,256 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 [2022-12-14 10:21:17,267 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 [2022-12-14 10:21:17,273 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 [2022-12-14 10:21:17,346 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 [2022-12-14 10:21:17,348 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 [2022-12-14 10:21:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-12-14 10:21:17,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:18,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1716860876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:18,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444889600] [2022-12-14 10:21:18,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:21:18,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:18,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:18,896 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:18,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 10:21:19,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:21:19,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 10:21:19,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:19,214 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 [2022-12-14 10:21:19,220 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 [2022-12-14 10:21:19,380 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2266 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_2266))) (exists ((v_ArrVal_2267 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_2267))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:19,410 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 [2022-12-14 10:21:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:19,415 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 [2022-12-14 10:21:19,422 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:21:19,423 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 [2022-12-14 10:21:19,434 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 [2022-12-14 10:21:19,439 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 [2022-12-14 10:21:19,536 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 [2022-12-14 10:21:19,539 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 [2022-12-14 10:21:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-12-14 10:21:19,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:21,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444889600] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:21,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:21,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 26 [2022-12-14 10:21:21,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684030533] [2022-12-14 10:21:21,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:21,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:21:21,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:21:21,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:21:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=792, Unknown=5, NotChecked=174, Total=1056 [2022-12-14 10:21:21,052 INFO L87 Difference]: Start difference. First operand 364 states and 493 transitions. Second operand has 26 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 19 states have internal predecessors, (43), 7 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 10:21:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:25,867 INFO L93 Difference]: Finished difference Result 469 states and 620 transitions. [2022-12-14 10:21:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:21:25,868 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 19 states have internal predecessors, (43), 7 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-12-14 10:21:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:25,869 INFO L225 Difference]: With dead ends: 469 [2022-12-14 10:21:25,869 INFO L226 Difference]: Without dead ends: 469 [2022-12-14 10:21:25,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=223, Invalid=1852, Unknown=7, NotChecked=270, Total=2352 [2022-12-14 10:21:25,870 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 310 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 94 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 748 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:25,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1875 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2355 Invalid, 11 Unknown, 748 Unchecked, 3.8s Time] [2022-12-14 10:21:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-12-14 10:21:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 384. [2022-12-14 10:21:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 244 states have (on average 1.4098360655737705) internal successors, (344), 303 states have internal predecessors, (344), 48 states have call successors, (48), 26 states have call predecessors, (48), 34 states have return successors, (124), 54 states have call predecessors, (124), 48 states have call successors, (124) [2022-12-14 10:21:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 516 transitions. [2022-12-14 10:21:25,880 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 516 transitions. Word has length 45 [2022-12-14 10:21:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:25,880 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 516 transitions. [2022-12-14 10:21:25,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 19 states have internal predecessors, (43), 7 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 10:21:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 516 transitions. [2022-12-14 10:21:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 10:21:25,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:25,881 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 10:21:25,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-14 10:21:26,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:26,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 10:21:26,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:26,483 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:21:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1840202044, now seen corresponding path program 4 times [2022-12-14 10:21:26,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:21:26,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678520776] [2022-12-14 10:21:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:21:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:21:26,490 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:21:26,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 10:21:26,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:26,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:21:26,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:26,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:21:26,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:21:26,896 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2450 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2450) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:26,930 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2450 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2450) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:26,993 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 [2022-12-14 10:21:27,078 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_267 (_ BitVec 32)) (v_ArrVal_2451 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2451) v_nondet_tree_~n~0.base_267 (_ bv12 32)) |c_#length|) (bvule (_ bv8 32) (select |c_#length| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:27,108 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_267 (_ BitVec 32)) (v_ArrVal_2451 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2451) v_nondet_tree_~n~0.base_267 (_ bv12 32)))) (and (bvule (_ bv8 32) (select .cse0 nondet_tree_~n~0.base)) (= .cse0 |c_#length|)))) is different from true [2022-12-14 10:21:27,152 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2450 (_ BitVec 32)) (v_nondet_tree_~n~0.base_267 (_ BitVec 32)) (v_nondet_tree_~n~0.base_268 (_ BitVec 32)) (v_ArrVal_2451 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_268 v_ArrVal_2450) nondet_tree_~n~0.base v_ArrVal_2451) v_nondet_tree_~n~0.base_267 (_ bv12 32)))) (and (= .cse0 |c_#length|) (bvule (_ bv8 32) (select .cse0 nondet_tree_~n~0.base)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_268))))) is different from true [2022-12-14 10:21:27,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:27,283 INFO L321 Elim1Store]: treesize reduction 59, result has 34.4 percent of original size [2022-12-14 10:21:27,284 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 [2022-12-14 10:21:27,306 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:21:27,306 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 [2022-12-14 10:21:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 45 proven. 9 refuted. 1 times theorem prover too weak. 33 trivial. 62 not checked. [2022-12-14 10:21:27,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:27,907 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:21:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678520776] [2022-12-14 10:21:27,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678520776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [449919823] [2022-12-14 10:21:27,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:27,908 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:21:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:21:27,909 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:21:27,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 10:21:28,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:28,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:28,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:21:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:28,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:21:28,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:21:28,578 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2604 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2604) |c_#valid|)) (exists ((v_ArrVal_2603 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2603) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:28,626 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2603 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2604 (_ BitVec 1))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2604) |c_#valid|) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2603) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:28,661 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2605 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2605) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:28,729 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_288 (_ BitVec 32)) (v_ArrVal_2605 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_288)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_288 v_ArrVal_2605) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-12-14 10:21:28,805 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2603 (_ BitVec 32)) (v_nondet_tree_~n~0.base_288 (_ BitVec 32)) (v_ArrVal_2605 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_289 (_ BitVec 32)) (v_ArrVal_2604 (_ BitVec 1))) (and (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_289 v_ArrVal_2603) v_nondet_tree_~n~0.base_288 v_ArrVal_2605) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_289)) (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_289 v_ArrVal_2604) v_nondet_tree_~n~0.base_288) (_ bv0 1)))) is different from true [2022-12-14 10:21:28,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:28,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:28,934 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-12-14 10:21:28,934 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 [2022-12-14 10:21:28,985 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-14 10:21:28,985 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 [2022-12-14 10:21:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 66 not checked. [2022-12-14 10:21:29,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:34,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [449919823] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:34,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775105398] [2022-12-14 10:21:34,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:34,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:34,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:34,814 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:34,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 10:21:35,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:35,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:35,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:21:35,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:35,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:21:35,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:21:35,100 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_2760 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2760) |c_#length|)))) is different from true [2022-12-14 10:21:35,127 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2760 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2760) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:35,200 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_309 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_309 (_ bv12 32)) |c_#length|)) is different from true [2022-12-14 10:21:35,239 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_309 (_ BitVec 32)) (v_nondet_tree_~n~0.base_310 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2760 (_ BitVec 32))) (and (= |c_#length| (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2760) v_nondet_tree_~n~0.base_310 (_ bv12 32)) v_nondet_tree_~n~0.base_309 (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:21:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:35,338 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-12-14 10:21:35,338 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 18 treesize of output 31 [2022-12-14 10:21:35,352 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:21:35,352 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 [2022-12-14 10:21:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 63 not checked. [2022-12-14 10:21:35,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:40,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775105398] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:40,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:40,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 23 [2022-12-14 10:21:40,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240441734] [2022-12-14 10:21:40,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:40,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 10:21:40,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:21:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 10:21:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=128, Unknown=23, NotChecked=540, Total=756 [2022-12-14 10:21:40,337 INFO L87 Difference]: Start difference. First operand 384 states and 516 transitions. Second operand has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 14 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-12-14 10:22:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:35,676 INFO L93 Difference]: Finished difference Result 408 states and 602 transitions. [2022-12-14 10:22:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:22:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 14 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) Word has length 61 [2022-12-14 10:22:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:35,679 INFO L225 Difference]: With dead ends: 408 [2022-12-14 10:22:35,679 INFO L226 Difference]: Without dead ends: 408 [2022-12-14 10:22:35,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=138, Invalid=299, Unknown=43, NotChecked=780, Total=1260 [2022-12-14 10:22:35,680 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 150 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 76 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 4567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 3695 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:35,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 499 Invalid, 4567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 775 Invalid, 21 Unknown, 3695 Unchecked, 3.0s Time] [2022-12-14 10:22:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-14 10:22:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 398. [2022-12-14 10:22:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 254 states have (on average 1.3937007874015748) internal successors, (354), 313 states have internal predecessors, (354), 50 states have call successors, (50), 26 states have call predecessors, (50), 36 states have return successors, (164), 58 states have call predecessors, (164), 50 states have call successors, (164) [2022-12-14 10:22:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 568 transitions. [2022-12-14 10:22:35,688 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 568 transitions. Word has length 61 [2022-12-14 10:22:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:35,688 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 568 transitions. [2022-12-14 10:22:35,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 21 states have internal predecessors, (67), 14 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-12-14 10:22:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 568 transitions. [2022-12-14 10:22:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 10:22:35,690 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:35,690 INFO L195 NwaCegarLoop]: trace histogram [17, 11, 11, 11, 11, 10, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1] [2022-12-14 10:22:35,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 10:22:35,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-12-14 10:22:36,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 10:22:36,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:22:36,292 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:22:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1700515370, now seen corresponding path program 2 times [2022-12-14 10:22:36,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:22:36,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772734866] [2022-12-14 10:22:36,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:22:36,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:22:36,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:22:36,301 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:22:36,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-14 10:22:37,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:22:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-14 10:22:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:37,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:22:37,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:22:37,484 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3053 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3053))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:22:37,519 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3053 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3053)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:22:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:37,581 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 [2022-12-14 10:22:37,595 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:22:37,595 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 [2022-12-14 10:22:37,650 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3055 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3055))) (exists ((v_ArrVal_3054 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3054))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:22:37,682 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 [2022-12-14 10:22:37,779 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_331 (_ BitVec 32)) (v_ArrVal_3055 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3054 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_331)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_331 v_ArrVal_3055) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_331 v_ArrVal_3054) nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:22:37,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:22:38,213 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-14 10:22:38,213 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 [2022-12-14 10:22:38,234 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_332 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_333 (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_333 (_ bv12 32)) v_nondet_tree_~n~0.base_332 (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_333 nondet_tree_~n~0.base)) (not (= v_nondet_tree_~n~0.base_332 nondet_tree_~n~0.base)) (not (= v_nondet_tree_~n~0.base_333 v_nondet_tree_~n~0.base_332)))) is different from true [2022-12-14 10:22:38,329 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_331 (_ BitVec 32)) (v_ArrVal_3055 (_ BitVec 32)) (v_nondet_tree_~n~0.base_332 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_333 (_ BitVec 32)) (v_nondet_tree_~n~0.base_334 (_ BitVec 32)) (v_ArrVal_3054 (_ BitVec 1))) (and (= (store (store (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_331 v_ArrVal_3055) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_334 (_ bv12 32)) v_nondet_tree_~n~0.base_333 (_ bv12 32)) v_nondet_tree_~n~0.base_332 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_331)) (not (= v_nondet_tree_~n~0.base_333 v_nondet_tree_~n~0.base_334)) (not (= v_nondet_tree_~n~0.base_334 v_nondet_tree_~n~0.base_332)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_331 v_ArrVal_3054) nondet_tree_~n~0.base)) (not (= v_nondet_tree_~n~0.base_333 v_nondet_tree_~n~0.base_332)))) is different from true [2022-12-14 10:22:38,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:38,569 INFO L321 Elim1Store]: treesize reduction 156, result has 15.7 percent of original size [2022-12-14 10:22:38,569 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 3 case distinctions, treesize of input 24 treesize of output 47 [2022-12-14 10:22:38,611 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-14 10:22:38,612 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 [2022-12-14 10:22:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 347 proven. 86 refuted. 0 times theorem prover too weak. 128 trivial. 243 not checked. [2022-12-14 10:22:38,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:39,380 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 10:22:39,380 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 22 treesize of output 18 [2022-12-14 10:22:41,547 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv12 32) c_nondet_tree_~n~0.offset))) (and (or (bvule (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset) .cse0) (forall ((v_ArrVal_3072 (_ BitVec 1)) (v_nondet_tree_~n~0.base_370 (_ BitVec 32)) (v_nondet_tree_~n~0.base_369 (_ BitVec 32))) (or (not (= (select (store |c_#valid| v_nondet_tree_~n~0.base_369 v_ArrVal_3072) v_nondet_tree_~n~0.base_370) (_ bv0 1))) (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_369)))))) (forall ((v_nondet_tree_~n~0.base_369 (_ BitVec 32))) (or (forall ((v_ArrVal_3072 (_ BitVec 1)) (v_nondet_tree_~n~0.base_370 (_ BitVec 32))) (or (forall ((v_nondet_tree_~n~0.base_368 (_ BitVec 32)) (v_nondet_tree_~n~0.base_367 (_ BitVec 32))) (or (= v_nondet_tree_~n~0.base_367 v_nondet_tree_~n~0.base_368) (forall ((v_nondet_tree_~n~0.base_371 (_ BitVec 32))) (or (= v_nondet_tree_~n~0.base_368 v_nondet_tree_~n~0.base_371) (= v_nondet_tree_~n~0.base_367 v_nondet_tree_~n~0.base_371) (forall ((v_ArrVal_3073 (_ BitVec 32))) (bvule .cse0 (select (store (store (store (store (store |c_#length| v_nondet_tree_~n~0.base_369 v_ArrVal_3073) v_nondet_tree_~n~0.base_370 (_ bv12 32)) v_nondet_tree_~n~0.base_368 (_ bv12 32)) v_nondet_tree_~n~0.base_371 (_ bv12 32)) v_nondet_tree_~n~0.base_367 (_ bv12 32)) c_nondet_tree_~n~0.base))))))) (not (= (select (store |c_#valid| v_nondet_tree_~n~0.base_369 v_ArrVal_3072) v_nondet_tree_~n~0.base_370) (_ bv0 1))))) (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_369))))))) is different from false [2022-12-14 10:22:41,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:22:41,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772734866] [2022-12-14 10:22:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772734866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:41,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1181171633] [2022-12-14 10:22:41,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:22:41,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:22:41,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:22:41,554 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:22:41,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 10:22:43,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:22:43,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:43,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-14 10:22:43,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:43,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:22:43,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:22:43,933 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3359 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3359) |c_#length|)) (exists ((v_ArrVal_3360 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3360))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:22:43,973 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3359 (_ BitVec 32)) (v_ArrVal_3360 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3360)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3359) |c_#length|))) is different from true [2022-12-14 10:22:44,064 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 10:22:44,064 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 [2022-12-14 10:22:44,068 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 [2022-12-14 10:22:44,238 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3363 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3363)) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:22:44,665 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3367 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3367) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:22:44,693 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3367 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3367) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:22:44,714 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 [2022-12-14 10:22:44,761 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3367 (_ BitVec 32)) (v_nondet_tree_~n~0.base_374 (_ 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_3367) v_nondet_tree_~n~0.base_374 (_ bv12 32)) |c_#length|))) is different from true [2022-12-14 10:22:44,800 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3367 (_ BitVec 32)) (v_nondet_tree_~n~0.base_375 (_ BitVec 32)) (v_ArrVal_3363 (_ BitVec 32)) (v_nondet_tree_~n~0.base_374 (_ 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_375)) (= (_ 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_3363) v_nondet_tree_~n~0.base_375 v_ArrVal_3367) v_nondet_tree_~n~0.base_374 (_ bv12 32))))) is different from true [2022-12-14 10:22:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:51,381 INFO L321 Elim1Store]: treesize reduction 67, result has 40.2 percent of original size [2022-12-14 10:22:51,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 53 [2022-12-14 10:22:51,493 INFO L321 Elim1Store]: treesize reduction 79, result has 21.8 percent of original size [2022-12-14 10:22:51,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 159 [2022-12-14 10:22:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 321 proven. 105 refuted. 0 times theorem prover too weak. 131 trivial. 247 not checked. [2022-12-14 10:22:51,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:23:00,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1181171633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:23:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533316053] [2022-12-14 10:23:00,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:23:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:23:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:23:00,870 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:23:00,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 10:23:01,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:23:01,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:23:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-14 10:23:01,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:23:01,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:23:01,539 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 10:23:01,539 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 [2022-12-14 10:23:06,645 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3693 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3693) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:23:06,670 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3693 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3693) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:23:06,720 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3693 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_416 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_416) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_416 v_ArrVal_3693) |c_#length|))) is different from true [2022-12-14 10:23:06,765 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3693 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_416 (_ BitVec 32)) (v_nondet_tree_~n~0.base_417 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_417 (_ bv1 1)))) (and (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_417 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_416 v_ArrVal_3693) |c_#length|) (= (select (store .cse0 nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_416) (_ bv0 1))))) is different from true [2022-12-14 10:23:06,873 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_418 (_ BitVec 32)) (v_ArrVal_3363 (_ BitVec 32)) (v_ArrVal_3693 (_ BitVec 32)) (v_ArrVal_3361 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_416 (_ BitVec 32)) (v_nondet_tree_~n~0.base_417 (_ BitVec 32)) (v_nondet_tree_~n~0.base_415 (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| v_nondet_tree_~n~0.base_418 (_ bv1 1)))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_415 (_ bv1 1)) v_nondet_tree_~n~0.base_417 (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 nondet_tree_~n~0.base)) (= |c_#length| (store (store (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_418 v_ArrVal_3361) v_nondet_tree_~n~0.base_415 v_ArrVal_3363) v_nondet_tree_~n~0.base_417 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_416 v_ArrVal_3693)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_418)) (= (_ bv0 1) (select (store .cse0 nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_416)) (= (select .cse1 v_nondet_tree_~n~0.base_415) (_ bv0 1)))))) is different from true [2022-12-14 10:23:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,170 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 10:23:07,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2022-12-14 10:23:07,253 INFO L321 Elim1Store]: treesize reduction 84, result has 16.8 percent of original size [2022-12-14 10:23:07,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 66 [2022-12-14 10:23:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 377 proven. 80 refuted. 0 times theorem prover too weak. 119 trivial. 228 not checked. [2022-12-14 10:23:07,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:23:16,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533316053] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:23:16,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:23:16,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 22] total 41 [2022-12-14 10:23:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667994727] [2022-12-14 10:23:16,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:23:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 10:23:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:23:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 10:23:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=535, Unknown=33, NotChecked=1386, Total=2070 [2022-12-14 10:23:16,932 INFO L87 Difference]: Start difference. First operand 398 states and 568 transitions. Second operand has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 38 states have internal predecessors, (142), 26 states have call successors, (34), 3 states have call predecessors, (34), 18 states have return successors, (39), 29 states have call predecessors, (39), 26 states have call successors, (39) [2022-12-14 10:23:19,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:23,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:25,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:27,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:31,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:35,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:39,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:41,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:44,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:46,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:50,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:54,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:56,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:23:58,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:01,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:05,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:10,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:12,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:14,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:16,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:20,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:22,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:24,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:28,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:31,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:33,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:35,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:37,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:41,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:44,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:24:52,900 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 74 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:24:56,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:25:07,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:25:30,987 WARN L233 SmtUtils]: Spent 12.92s on a formula simplification. DAG size of input: 102 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:26:02,009 WARN L233 SmtUtils]: Spent 12.93s on a formula simplification. DAG size of input: 106 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:26:05,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:26:06,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:26:17,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:26:26,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:26:31,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:26:34,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:26:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:44,036 INFO L93 Difference]: Finished difference Result 441 states and 712 transitions. [2022-12-14 10:26:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:26:44,041 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 38 states have internal predecessors, (142), 26 states have call successors, (34), 3 states have call predecessors, (34), 18 states have return successors, (39), 29 states have call predecessors, (39), 26 states have call successors, (39) Word has length 133 [2022-12-14 10:26:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:44,043 INFO L225 Difference]: With dead ends: 441 [2022-12-14 10:26:44,043 INFO L226 Difference]: Without dead ends: 441 [2022-12-14 10:26:44,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 351 SyntacticMatches, 13 SemanticMatches, 55 ConstructedPredicates, 21 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 113.5s TimeCoverageRelationStatistics Valid=245, Invalid=1048, Unknown=51, NotChecked=1848, Total=3192 [2022-12-14 10:26:44,044 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 191 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 127 mSolverCounterUnsat, 109 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 7534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 109 IncrementalHoareTripleChecker+Unknown, 4905 IncrementalHoareTripleChecker+Unchecked, 123.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:44,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 982 Invalid, 7534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2393 Invalid, 109 Unknown, 4905 Unchecked, 123.9s Time] [2022-12-14 10:26:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-12-14 10:26:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 418. [2022-12-14 10:26:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 268 states have (on average 1.3805970149253732) internal successors, (370), 328 states have internal predecessors, (370), 52 states have call successors, (52), 28 states have call predecessors, (52), 40 states have return successors, (197), 61 states have call predecessors, (197), 52 states have call successors, (197) [2022-12-14 10:26:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 619 transitions. [2022-12-14 10:26:44,056 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 619 transitions. Word has length 133 [2022-12-14 10:26:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:44,057 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 619 transitions. [2022-12-14 10:26:44,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 38 states have internal predecessors, (142), 26 states have call successors, (34), 3 states have call predecessors, (34), 18 states have return successors, (39), 29 states have call predecessors, (39), 26 states have call successors, (39) [2022-12-14 10:26:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 619 transitions. [2022-12-14 10:26:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 10:26:44,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:44,058 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] [2022-12-14 10:26:44,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-12-14 10:26:44,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-12-14 10:26:44,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-14 10:26:44,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:44,660 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:26:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash -626976300, now seen corresponding path program 3 times [2022-12-14 10:26:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:44,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743465366] [2022-12-14 10:26:44,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:26:44,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:44,665 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:26:44,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 10:26:44,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:26:44,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 10:26:44,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:45,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:26:45,099 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 [2022-12-14 10:26:45,351 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 [2022-12-14 10:26:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:26:45,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:26:46,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:46,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743465366] [2022-12-14 10:26:46,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743465366] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:46,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1467094265] [2022-12-14 10:26:46,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:26:46,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:26:46,297 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:26:46,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 10:26:46,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:26:46,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 10:26:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:46,800 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 [2022-12-14 10:26:46,907 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 [2022-12-14 10:26:47,268 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 [2022-12-14 10:26:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:26:47,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:26:47,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1467094265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:47,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121629465] [2022-12-14 10:26:47,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:26:47,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:47,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:47,991 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:47,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 10:26:48,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:26:48,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:48,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:26:48,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:48,236 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 [2022-12-14 10:26:48,288 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 [2022-12-14 10:26:48,377 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 [2022-12-14 10:26:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:26:48,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:26:48,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121629465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:48,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:26:48,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16, 15, 15, 14] total 25 [2022-12-14 10:26:48,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111080366] [2022-12-14 10:26:48,894 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:26:48,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:26:48,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:26:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:26:48,895 INFO L87 Difference]: Start difference. First operand 418 states and 619 transitions. Second operand has 26 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 8 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 10:26:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:57,289 INFO L93 Difference]: Finished difference Result 503 states and 721 transitions. [2022-12-14 10:26:57,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 10:26:57,290 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 8 states have call predecessors, (13), 5 states have call successors, (13) Word has length 45 [2022-12-14 10:26:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:57,292 INFO L225 Difference]: With dead ends: 503 [2022-12-14 10:26:57,292 INFO L226 Difference]: Without dead ends: 503 [2022-12-14 10:26:57,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 240 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 10:26:57,293 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 425 mSDsluCounter, 1901 mSDsCounter, 0 mSdLazyCounter, 3663 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 3798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:57,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 2069 Invalid, 3798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3663 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-12-14 10:26:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-12-14 10:26:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 432. [2022-12-14 10:26:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 279 states have (on average 1.3870967741935485) internal successors, (387), 339 states have internal predecessors, (387), 54 states have call successors, (54), 29 states have call predecessors, (54), 41 states have return successors, (199), 63 states have call predecessors, (199), 54 states have call successors, (199) [2022-12-14 10:26:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 640 transitions. [2022-12-14 10:26:57,304 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 640 transitions. Word has length 45 [2022-12-14 10:26:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:57,304 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 640 transitions. [2022-12-14 10:26:57,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 8 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 10:26:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 640 transitions. [2022-12-14 10:26:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 10:26:57,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:57,305 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] [2022-12-14 10:26:57,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 10:26:57,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-12-14 10:26:57,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-12-14 10:26:57,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:57,908 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:26:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash -626976299, now seen corresponding path program 1 times [2022-12-14 10:26:57,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:57,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689065124] [2022-12-14 10:26:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:57,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:57,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:57,910 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:26:57,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-12-14 10:26:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:58,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 10:26:58,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:58,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:26:58,397 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 [2022-12-14 10:26:58,407 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 [2022-12-14 10:26:58,522 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 [2022-12-14 10:26:58,532 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 23 treesize of output 22 [2022-12-14 10:26:58,868 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 [2022-12-14 10:26:58,875 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 [2022-12-14 10:26:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:26:59,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:04,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:27:04,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689065124] [2022-12-14 10:27:04,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689065124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:27:04,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865323918] [2022-12-14 10:27:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:04,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:27:04,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:27:04,231 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:27:04,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 10:27:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 10:27:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:04,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:27:04,999 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 [2022-12-14 10:27:05,009 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 [2022-12-14 10:27:05,214 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 [2022-12-14 10:27:05,223 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 [2022-12-14 10:27:05,953 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 [2022-12-14 10:27:05,959 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 [2022-12-14 10:27:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:05,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:09,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [865323918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:27:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100683845] [2022-12-14 10:27:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:09,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:09,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:09,139 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:27:09,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 10:27:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 10:27:09,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:09,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:27:09,423 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 [2022-12-14 10:27:09,431 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 [2022-12-14 10:27:09,493 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 [2022-12-14 10:27:09,502 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 [2022-12-14 10:27:09,755 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 [2022-12-14 10:27:09,760 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 [2022-12-14 10:27:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:09,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:27:12,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100683845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:27:12,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:27:12,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16, 15, 16, 15] total 37 [2022-12-14 10:27:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393261964] [2022-12-14 10:27:12,838 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:27:12,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 10:27:12,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:27:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 10:27:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 10:27:12,840 INFO L87 Difference]: Start difference. First operand 432 states and 640 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) [2022-12-14 10:27:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:33,526 INFO L93 Difference]: Finished difference Result 482 states and 704 transitions. [2022-12-14 10:27:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 10:27:33,528 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 [2022-12-14 10:27:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:33,530 INFO L225 Difference]: With dead ends: 482 [2022-12-14 10:27:33,530 INFO L226 Difference]: Without dead ends: 482 [2022-12-14 10:27:33,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=365, Invalid=3541, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 10:27:33,531 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 229 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 4942 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 5031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 4942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:33,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 2475 Invalid, 5031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 4942 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2022-12-14 10:27:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-12-14 10:27:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 462. [2022-12-14 10:27:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 302 states have (on average 1.3708609271523178) internal successors, (414), 362 states have internal predecessors, (414), 59 states have call successors, (59), 31 states have call predecessors, (59), 43 states have return successors, (204), 68 states have call predecessors, (204), 59 states have call successors, (204) [2022-12-14 10:27:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 677 transitions. [2022-12-14 10:27:33,547 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 677 transitions. Word has length 45 [2022-12-14 10:27:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:33,547 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 677 transitions. [2022-12-14 10:27:33,547 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) [2022-12-14 10:27:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 677 transitions. [2022-12-14 10:27:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:27:33,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:33,548 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 10:27:33,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-12-14 10:27:33,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-14 10:27:33,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-12-14 10:27:34,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:27:34,150 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:27:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash -211959914, now seen corresponding path program 5 times [2022-12-14 10:27:34,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:27:34,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592425958] [2022-12-14 10:27:34,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:27:34,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:27:34,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:27:34,157 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:27:34,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 10:27:34,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 10:27:34,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:27:34,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 10:27:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:35,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:27:35,011 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 [2022-12-14 10:27:35,073 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4281 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4281) |c_#length|)) (exists ((v_ArrVal_4280 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4280) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:27:35,115 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4282 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4282) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:27:35,156 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4282 (_ 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_4282) |c_#length|))) is different from true [2022-12-14 10:27:35,239 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4280 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4282 (_ BitVec 32)) (v_ArrVal_4281 (_ BitVec 32)) (v_nondet_tree_~n~0.base_525 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_525 v_ArrVal_4281) nondet_tree_~n~0.base v_ArrVal_4282) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_525) (_ bv0 1)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_525 v_ArrVal_4280) nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:27:35,280 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 [2022-12-14 10:27:35,356 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4280 (_ BitVec 1)) (v_ArrVal_4282 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4281 (_ BitVec 32)) (v_nondet_tree_~n~0.base_526 (_ BitVec 32)) (v_nondet_tree_~n~0.base_525 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_525) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_525 v_ArrVal_4281) v_nondet_tree_~n~0.base_526 v_ArrVal_4282) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_525 v_ArrVal_4280) v_nondet_tree_~n~0.base_526)))) is different from true [2022-12-14 10:27:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:35,514 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-12-14 10:27:35,514 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 [2022-12-14 10:27:35,562 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-14 10:27:35,563 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 [2022-12-14 10:27:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 66 not checked. [2022-12-14 10:27:35,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:38,002 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset))) (and (or (forall ((v_ArrVal_4294 (_ BitVec 1)) (v_nondet_tree_~n~0.base_540 (_ BitVec 32)) (v_nondet_tree_~n~0.base_541 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_541 v_ArrVal_4294) v_nondet_tree_~n~0.base_540))) (not (= (select |c_#valid| v_nondet_tree_~n~0.base_541) (_ bv0 1))))) (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse0)) (forall ((v_nondet_tree_~n~0.base_541 (_ BitVec 32))) (or (forall ((v_ArrVal_4294 (_ BitVec 1)) (v_nondet_tree_~n~0.base_540 (_ BitVec 32))) (or (forall ((v_ArrVal_4295 (_ BitVec 32)) (v_ArrVal_4296 (_ BitVec 32)) (v_nondet_tree_~n~0.base_542 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_nondet_tree_~n~0.base_541 v_ArrVal_4295) v_nondet_tree_~n~0.base_540 v_ArrVal_4296) v_nondet_tree_~n~0.base_542 (_ bv12 32)) c_nondet_tree_~n~0.base))) (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_541 v_ArrVal_4294) v_nondet_tree_~n~0.base_540))))) (not (= (select |c_#valid| v_nondet_tree_~n~0.base_541) (_ bv0 1))))))) is different from false [2022-12-14 10:27:38,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:27:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592425958] [2022-12-14 10:27:38,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592425958] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:27:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [896011861] [2022-12-14 10:27:38,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:27:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:27:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:27:38,008 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:27:38,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 10:27:38,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:27:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657476702] [2022-12-14 10:27:38,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:27:38,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:38,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:38,392 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:27:38,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 10:27:38,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 1 [2022-12-14 10:27:45,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 10:27:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:27:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 10:27:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:45,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:27:45,805 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4510 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4510) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:27:45,842 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4510 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4510) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:27:45,941 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4510 (_ BitVec 32)) (v_ArrVal_4509 (_ BitVec 32)) (v_nondet_tree_~n~0.base_544 (_ BitVec 32)) (v_ArrVal_4507 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_543 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_544 (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_543)) (= (_ bv0 1) (select (store .cse0 v_nondet_tree_~n~0.base_543 (_ bv1 1)) nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_544 v_ArrVal_4507) v_nondet_tree_~n~0.base_543 v_ArrVal_4509) nondet_tree_~n~0.base v_ArrVal_4510) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_544) (_ bv0 1))))) is different from true [2022-12-14 10:27:46,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:46,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:46,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:46,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:46,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:46,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:46,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-12-14 10:27:46,082 INFO L321 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2022-12-14 10:27:46,082 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 35 treesize of output 39 [2022-12-14 10:27:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 44 not checked. [2022-12-14 10:27:46,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:53,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657476702] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:27:53,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:27:53,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2022-12-14 10:27:53,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692762315] [2022-12-14 10:27:53,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:27:53,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:27:53,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:27:53,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:27:53,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=135, Unknown=10, NotChecked=310, Total=506 [2022-12-14 10:27:53,015 INFO L87 Difference]: Start difference. First operand 462 states and 677 transitions. Second operand has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 12 states have call successors, (14), 3 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2022-12-14 10:28:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:28:02,199 INFO L93 Difference]: Finished difference Result 480 states and 750 transitions. [2022-12-14 10:28:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:28:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 12 states have call successors, (14), 3 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) Word has length 53 [2022-12-14 10:28:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:28:02,202 INFO L225 Difference]: With dead ends: 480 [2022-12-14 10:28:02,202 INFO L226 Difference]: Without dead ends: 480 [2022-12-14 10:28:02,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=74, Invalid=194, Unknown=12, NotChecked=370, Total=650 [2022-12-14 10:28:02,203 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 163 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 77 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 2134 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:28:02,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 494 Invalid, 3219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 991 Invalid, 17 Unknown, 2134 Unchecked, 3.8s Time] [2022-12-14 10:28:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-12-14 10:28:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 469. [2022-12-14 10:28:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 307 states have (on average 1.3648208469055374) internal successors, (419), 367 states have internal predecessors, (419), 60 states have call successors, (60), 31 states have call predecessors, (60), 44 states have return successors, (230), 70 states have call predecessors, (230), 60 states have call successors, (230) [2022-12-14 10:28:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 709 transitions. [2022-12-14 10:28:02,215 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 709 transitions. Word has length 53 [2022-12-14 10:28:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:28:02,215 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 709 transitions. [2022-12-14 10:28:02,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 12 states have call successors, (14), 3 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2022-12-14 10:28:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 709 transitions. [2022-12-14 10:28:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 10:28:02,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:28:02,216 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1] [2022-12-14 10:28:02,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-12-14 10:28:02,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 10:28:02,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:02,618 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:28:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:28:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash -830138409, now seen corresponding path program 3 times [2022-12-14 10:28:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:28:02,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458191403] [2022-12-14 10:28:02,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:28:02,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:28:02,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:28:02,624 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:28:02,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-12-14 10:28:03,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 10:28:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:28:03,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 10:28:03,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:28:03,661 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 5 [2022-12-14 10:28:03,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:28:03,775 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4712 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4712) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:28:03,811 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 [2022-12-14 10:28:03,873 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_561 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4712 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_561)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_561 v_ArrVal_4712) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-12-14 10:28:03,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:28:03,950 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 [2022-12-14 10:28:04,057 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:28:04,057 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 [2022-12-14 10:28:04,069 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_562 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_562 nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_562 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-12-14 10:28:04,156 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_562 (_ BitVec 32)) (v_nondet_tree_~n~0.base_563 (_ BitVec 32)) (v_nondet_tree_~n~0.base_561 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4712 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_561)) (= (store (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_561 v_ArrVal_4712) v_nondet_tree_~n~0.base_563 (_ bv12 32)) v_nondet_tree_~n~0.base_562 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_562 nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:28:04,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:04,358 INFO L321 Elim1Store]: treesize reduction 118, result has 18.1 percent of original size [2022-12-14 10:28:04,358 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 21 treesize of output 39 [2022-12-14 10:28:04,387 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:28:04,388 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 [2022-12-14 10:28:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 109 proven. 30 refuted. 0 times theorem prover too weak. 53 trivial. 133 not checked. [2022-12-14 10:28:04,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:28:04,984 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 [2022-12-14 10:28:08,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:28:08,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458191403] [2022-12-14 10:28:08,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458191403] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:28:08,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426501641] [2022-12-14 10:28:08,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:28:08,385 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:28:08,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:28:08,386 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:28:08,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 10:28:10,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 10:28:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:28:10,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 10:28:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:28:10,048 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 7 [2022-12-14 10:28:10,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:28:21,525 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4917 (_ BitVec 32)) (v_ArrVal_4906 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|v_nondet_tree_#t~ret8.base_617| (_ BitVec 32)) (v_ArrVal_4915 (_ BitVec 32)) (v_ArrVal_4912 (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)))) (let ((.cse1 (store .cse0 |nondet_tree_#t~ret8.base| (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 |nondet_tree_#t~ret8.base|)) (= (_ bv0 1) (select .cse1 |c_nondet_tree_#t~ret9.base|)) (= (store (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4917) |nondet_tree_#t~ret8.base| v_ArrVal_4915) |c_nondet_tree_#t~ret9.base| v_ArrVal_4906) |v_nondet_tree_#t~ret8.base_617| v_ArrVal_4912) |c_#length|) (= (_ bv0 1) (select (store .cse1 |c_nondet_tree_#t~ret9.base| (_ bv1 1)) |v_nondet_tree_#t~ret8.base_617|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))))) is different from true [2022-12-14 10:28:21,575 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4917 (_ BitVec 32)) (v_ArrVal_4906 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|v_nondet_tree_#t~ret8.base_617| (_ BitVec 32)) (v_ArrVal_4915 (_ BitVec 32)) (v_ArrVal_4912 (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)))) (let ((.cse1 (store .cse0 |nondet_tree_#t~ret8.base| (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 |nondet_tree_#t~ret8.base|)) (= (store (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4917) |nondet_tree_#t~ret8.base| v_ArrVal_4915) |nondet_tree_#t~ret9.base| v_ArrVal_4906) |v_nondet_tree_#t~ret8.base_617| v_ArrVal_4912) |c_#length|) (= (select .cse1 |nondet_tree_#t~ret9.base|) (_ bv0 1)) (= (_ bv0 1) (select (store .cse1 |nondet_tree_#t~ret9.base| (_ bv1 1)) |v_nondet_tree_#t~ret8.base_617|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))))) is different from true [2022-12-14 10:28:21,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:21,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 10:28:21,784 INFO L321 Elim1Store]: treesize reduction 84, result has 16.8 percent of original size [2022-12-14 10:28:21,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 58 [2022-12-14 10:28:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 109 proven. 135 refuted. 8 times theorem prover too weak. 48 trivial. 25 not checked. [2022-12-14 10:28:21,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:28:35,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426501641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:28:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290173596] [2022-12-14 10:28:35,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:28:35,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:35,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:28:35,477 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:28:35,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 10:29:11,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 10:29:11,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:29:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 10:29:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:29:11,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:29:11,913 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_607 (_ BitVec 32)) (v_ArrVal_4906 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_607) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4906) v_nondet_tree_~n~0.base_607 (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:29:12,139 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:29:12,139 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 [2022-12-14 10:29:12,151 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_608 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_608 nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_608 (_ bv12 32)) |c_#length|))) is different from true [2022-12-14 10:29:12,242 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_607 (_ BitVec 32)) (v_nondet_tree_~n~0.base_608 (_ BitVec 32)) (v_nondet_tree_~n~0.base_609 (_ BitVec 32)) (v_ArrVal_4906 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_609 (_ bv1 1)) v_nondet_tree_~n~0.base_607) (_ bv0 1)) (not (= v_nondet_tree_~n~0.base_608 nondet_tree_~n~0.base)) (= |c_#length| (store (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_609 v_ArrVal_4906) v_nondet_tree_~n~0.base_607 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_608 (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_609)))) is different from true [2022-12-14 10:29:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:12,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:12,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:12,431 INFO L321 Elim1Store]: treesize reduction 83, result has 21.7 percent of original size [2022-12-14 10:29:12,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 36 [2022-12-14 10:29:12,475 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-14 10:29:12,475 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 [2022-12-14 10:29:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 111 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 117 not checked. [2022-12-14 10:29:12,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:29:13,190 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 10:29:13,190 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 [2022-12-14 10:29:25,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290173596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:29:25,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:29:25,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 14] total 30 [2022-12-14 10:29:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775274419] [2022-12-14 10:29:25,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:29:25,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:29:25,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:29:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:29:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=486, Unknown=23, NotChecked=594, Total=1190 [2022-12-14 10:29:25,018 INFO L87 Difference]: Start difference. First operand 469 states and 709 transitions. Second operand has 31 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 27 states have internal predecessors, (100), 17 states have call successors, (24), 3 states have call predecessors, (24), 13 states have return successors, (26), 18 states have call predecessors, (26), 17 states have call successors, (26) [2022-12-14 10:29:27,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:31,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:33,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:35,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:40,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:44,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:46,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:48,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:50,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:52,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:29:56,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:00,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:02,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:04,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:10,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:12,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:16,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:24,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:26,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:30:42,630 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 84 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:32:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:20,942 INFO L93 Difference]: Finished difference Result 527 states and 929 transitions. [2022-12-14 10:32:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 10:32:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 27 states have internal predecessors, (100), 17 states have call successors, (24), 3 states have call predecessors, (24), 13 states have return successors, (26), 18 states have call predecessors, (26), 17 states have call successors, (26) Word has length 87 [2022-12-14 10:32:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:20,949 INFO L225 Difference]: With dead ends: 527 [2022-12-14 10:32:20,949 INFO L226 Difference]: Without dead ends: 527 [2022-12-14 10:32:20,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 234 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 150.5s TimeCoverageRelationStatistics Valid=301, Invalid=1249, Unknown=54, NotChecked=946, Total=2550 [2022-12-14 10:32:20,950 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 186 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 108 mSolverCounterUnsat, 79 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 5388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 79 IncrementalHoareTripleChecker+Unknown, 2883 IncrementalHoareTripleChecker+Unchecked, 64.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:20,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1052 Invalid, 5388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2318 Invalid, 79 Unknown, 2883 Unchecked, 64.1s Time] [2022-12-14 10:32:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-12-14 10:32:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 512. [2022-12-14 10:32:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 337 states have (on average 1.3382789317507418) internal successors, (451), 400 states have internal predecessors, (451), 67 states have call successors, (67), 33 states have call predecessors, (67), 50 states have return successors, (330), 78 states have call predecessors, (330), 67 states have call successors, (330) [2022-12-14 10:32:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 848 transitions. [2022-12-14 10:32:20,964 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 848 transitions. Word has length 87 [2022-12-14 10:32:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:20,965 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 848 transitions. [2022-12-14 10:32:20,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 27 states have internal predecessors, (100), 17 states have call successors, (24), 3 states have call predecessors, (24), 13 states have return successors, (26), 18 states have call predecessors, (26), 17 states have call successors, (26) [2022-12-14 10:32:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 848 transitions. [2022-12-14 10:32:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:32:20,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:20,966 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 10:32:20,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-12-14 10:32:21,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-12-14 10:32:21,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-14 10:32:21,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:21,568 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:32:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash -374049066, now seen corresponding path program 6 times [2022-12-14 10:32:21,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:21,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112980979] [2022-12-14 10:32:21,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:32:21,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:21,571 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:32:21,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-12-14 10:32:22,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 10:32:22,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 10:32:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:22,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:32:22,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:32:22,177 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5253 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5253))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:32:22,215 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 [2022-12-14 10:32:22,271 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5253 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_635 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5253) v_nondet_tree_~n~0.base_635 (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:32:22,353 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5253 (_ BitVec 32)) (v_ArrVal_5252 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_636 (_ BitVec 32)) (v_nondet_tree_~n~0.base_635 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_636) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_636 v_ArrVal_5252) nondet_tree_~n~0.base v_ArrVal_5253) v_nondet_tree_~n~0.base_635 (_ bv12 32)) |c_#length|) (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_636 (_ bv1 1)) nondet_tree_~n~0.base) (_ bv0 1)))) is different from true [2022-12-14 10:32:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:22,538 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 10:32:22,538 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 [2022-12-14 10:32:22,578 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-14 10:32:22,579 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 [2022-12-14 10:32:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 63 not checked. [2022-12-14 10:32:22,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:25,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:32:25,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112980979] [2022-12-14 10:32:25,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112980979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:32:25,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [31918369] [2022-12-14 10:32:25,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:32:25,239 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:32:25,239 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:32:25,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-12-14 10:32:25,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:32:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211600566] [2022-12-14 10:32:25,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:32:25,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:25,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:25,733 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:25,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 10:32:25,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 1 [2022-12-14 10:32:27,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 10:32:27,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 10:32:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:27,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:32:27,156 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_5477 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5477) |c_#length|)))) is different from true [2022-12-14 10:32:27,246 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5477 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_656 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5477) v_nondet_tree_~n~0.base_656 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:32:27,337 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5477 (_ BitVec 32)) (v_ArrVal_5252 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_656 (_ BitVec 32)) (v_nondet_tree_~n~0.base_657 (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5252) v_nondet_tree_~n~0.base_657 v_ArrVal_5477) v_nondet_tree_~n~0.base_656 (_ bv12 32)) |c_#length|) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_657) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-12-14 10:32:27,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:27,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:27,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:27,541 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 10:32:27,541 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 [2022-12-14 10:32:27,596 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-14 10:32:27,596 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 [2022-12-14 10:32:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 63 not checked. [2022-12-14 10:32:27,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:34,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211600566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:32:34,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:32:34,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-12-14 10:32:34,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562861906] [2022-12-14 10:32:34,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:34,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:32:34,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:32:34,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:32:34,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=72, Unknown=9, NotChecked=154, Total=272 [2022-12-14 10:32:34,194 INFO L87 Difference]: Start difference. First operand 512 states and 848 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 10 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) [2022-12-14 10:32:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:47,266 INFO L93 Difference]: Finished difference Result 534 states and 974 transitions. [2022-12-14 10:32:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:32:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 10 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) Word has length 53 [2022-12-14 10:32:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:47,269 INFO L225 Difference]: With dead ends: 534 [2022-12-14 10:32:47,269 INFO L226 Difference]: Without dead ends: 534 [2022-12-14 10:32:47,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=64, Invalid=132, Unknown=14, NotChecked=210, Total=420 [2022-12-14 10:32:47,270 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 83 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 40 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 1644 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:47,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 459 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 755 Invalid, 7 Unknown, 1644 Unchecked, 2.5s Time] [2022-12-14 10:32:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-12-14 10:32:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 519. [2022-12-14 10:32:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 342 states have (on average 1.3333333333333333) internal successors, (456), 405 states have internal predecessors, (456), 68 states have call successors, (68), 33 states have call predecessors, (68), 51 states have return successors, (366), 80 states have call predecessors, (366), 68 states have call successors, (366) [2022-12-14 10:32:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 890 transitions. [2022-12-14 10:32:47,285 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 890 transitions. Word has length 53 [2022-12-14 10:32:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:47,286 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 890 transitions. [2022-12-14 10:32:47,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 10 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) [2022-12-14 10:32:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 890 transitions. [2022-12-14 10:32:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 10:32:47,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:47,287 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:47,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-12-14 10:32:47,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 10:32:47,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:47,688 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:32:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:47,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1313295925, now seen corresponding path program 2 times [2022-12-14 10:32:47,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:47,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539460682] [2022-12-14 10:32:47,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:32:47,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:47,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:47,696 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:32:47,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-12-14 10:32:48,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:32:48,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 10:32:48,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:48,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:32:48,173 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 [2022-12-14 10:32:48,595 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 [2022-12-14 10:32:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:32:48,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:32:49,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:32:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539460682] [2022-12-14 10:32:49,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539460682] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [168427314] [2022-12-14 10:32:49,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:32:49,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:49,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:32:49,267 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:32:49,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-14 10:32:49,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:32:49,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:32:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:49,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:32:50,025 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 [2022-12-14 10:32:50,708 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 [2022-12-14 10:32:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:32:50,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:32:51,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [168427314] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188843059] [2022-12-14 10:32:51,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:32:51,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:51,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:51,261 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:51,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 10:32:51,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:32:51,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:32:51,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:51,566 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 [2022-12-14 10:32:51,828 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 [2022-12-14 10:32:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:32:51,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:32:52,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188843059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:52,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:32:52,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16, 14, 16, 14] total 25 [2022-12-14 10:32:52,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772227445] [2022-12-14 10:32:52,239 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:52,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:32:52,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:32:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:32:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:32:52,240 INFO L87 Difference]: Start difference. First operand 519 states and 890 transitions. Second operand has 26 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 10:32:54,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 10:32:56,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 10:32:58,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:03,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:05,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:07,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:09,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:11,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:18,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:21,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 10:33:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:33:22,460 INFO L93 Difference]: Finished difference Result 669 states and 1105 transitions. [2022-12-14 10:33:22,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:33:22,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 52 [2022-12-14 10:33:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:33:22,463 INFO L225 Difference]: With dead ends: 669 [2022-12-14 10:33:22,463 INFO L226 Difference]: Without dead ends: 667 [2022-12-14 10:33:22,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 284 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 10:33:22,464 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 270 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 3888 mSolverCounterSat, 101 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 3999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3888 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:33:22,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1779 Invalid, 3999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3888 Invalid, 10 Unknown, 0 Unchecked, 29.2s Time] [2022-12-14 10:33:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-12-14 10:33:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 540. [2022-12-14 10:33:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 358 states have (on average 1.3379888268156424) internal successors, (479), 423 states have internal predecessors, (479), 71 states have call successors, (71), 35 states have call predecessors, (71), 53 states have return successors, (416), 81 states have call predecessors, (416), 71 states have call successors, (416) [2022-12-14 10:33:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 966 transitions. [2022-12-14 10:33:22,478 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 966 transitions. Word has length 52 [2022-12-14 10:33:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:33:22,479 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 966 transitions. [2022-12-14 10:33:22,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 10:33:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 966 transitions. [2022-12-14 10:33:22,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 10:33:22,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:33:22,480 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:33:22,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-12-14 10:33:22,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-12-14 10:33:22,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-12-14 10:33:23,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:33:23,082 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:33:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:33:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1313295924, now seen corresponding path program 1 times [2022-12-14 10:33:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:33:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354249709] [2022-12-14 10:33:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:33:23,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:33:23,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:33:23,086 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:33:23,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-14 10:33:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:33:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 10:33:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:33:23,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:33:23,498 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 [2022-12-14 10:33:23,509 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 [2022-12-14 10:33:24,077 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 [2022-12-14 10:33:24,085 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 [2022-12-14 10:33:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:33:24,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:33:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:33:27,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:33:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354249709] [2022-12-14 10:33:27,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354249709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:33:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1868884145] [2022-12-14 10:33:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:33:27,864 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:33:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:33:27,865 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:33:27,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-14 10:33:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:33:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 10:33:28,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:33:28,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:33:28,821 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 [2022-12-14 10:33:28,830 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 [2022-12-14 10:33:30,166 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 [2022-12-14 10:33:30,174 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 [2022-12-14 10:33:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:33:30,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:33:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:33:32,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1868884145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:33:32,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386345612] [2022-12-14 10:33:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:33:32,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:33:32,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:33:32,360 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:33:32,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 10:33:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:33:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 10:33:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:33:32,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:33:32,729 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 [2022-12-14 10:33:32,742 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 [2022-12-14 10:33:33,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 10:33:33,384 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 [2022-12-14 10:33:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:33:33,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:33:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:33:35,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386345612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:33:35,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:33:35,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16, 14, 16, 14] total 37 [2022-12-14 10:33:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929821513] [2022-12-14 10:33:35,517 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:33:35,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 10:33:35,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:33:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 10:33:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 10:33:35,519 INFO L87 Difference]: Start difference. First operand 540 states and 966 transitions. Second operand has 38 states, 32 states have (on average 2.5625) internal successors, (82), 27 states have internal predecessors, (82), 12 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (15), 13 states have call predecessors, (15), 7 states have call successors, (15) [2022-12-14 10:33:51,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:55,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:33:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:33:59,890 INFO L93 Difference]: Finished difference Result 644 states and 1189 transitions. [2022-12-14 10:33:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 10:33:59,891 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 2.5625) internal successors, (82), 27 states have internal predecessors, (82), 12 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (15), 13 states have call predecessors, (15), 7 states have call successors, (15) Word has length 52 [2022-12-14 10:33:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:33:59,893 INFO L225 Difference]: With dead ends: 644 [2022-12-14 10:33:59,893 INFO L226 Difference]: Without dead ends: 644 [2022-12-14 10:33:59,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 277 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 10:33:59,895 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 259 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 4074 mSolverCounterSat, 139 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 4215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4074 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:33:59,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1877 Invalid, 4215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4074 Invalid, 2 Unknown, 0 Unchecked, 19.3s Time] [2022-12-14 10:33:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-12-14 10:33:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 610. [2022-12-14 10:33:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 410 states have (on average 1.3317073170731708) internal successors, (546), 476 states have internal predecessors, (546), 83 states have call successors, (83), 40 states have call predecessors, (83), 59 states have return successors, (521), 93 states have call predecessors, (521), 83 states have call successors, (521) [2022-12-14 10:33:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1150 transitions. [2022-12-14 10:33:59,913 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1150 transitions. Word has length 52 [2022-12-14 10:33:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:33:59,914 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 1150 transitions. [2022-12-14 10:33:59,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 2.5625) internal successors, (82), 27 states have internal predecessors, (82), 12 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (15), 13 states have call predecessors, (15), 7 states have call successors, (15) [2022-12-14 10:33:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1150 transitions. [2022-12-14 10:33:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 10:33:59,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:33:59,915 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:33:59,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-12-14 10:34:00,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-14 10:34:00,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-12-14 10:34:00,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:34:00,517 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 10:34:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:34:00,519 INFO L85 PathProgramCache]: Analyzing trace with hash -60976456, now seen corresponding path program 1 times [2022-12-14 10:34:00,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:34:00,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387933206] [2022-12-14 10:34:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:34:00,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:34:00,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:34:00,521 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:34:00,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-12-14 10:34:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:34:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:34:00,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:34:00,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:34:01,087 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 10:34:01,087 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 [2022-12-14 10:34:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:34:01,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:34:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:34:01,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:34:01,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387933206] [2022-12-14 10:34:01,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387933206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:34:01,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374177479] [2022-12-14 10:34:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:34:01,507 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:34:01,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:34:01,508 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:34:01,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_404874e0-af69-4901-9b60-531070b3eadf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-12-14 10:34:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:34:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:34:02,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:34:02,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:34:02,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 10:34:02,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5