./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- 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-6b4ec56 [2022-11-20 21:15:42,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:15:42,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:15:42,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:15:42,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:15:42,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:15:42,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:15:42,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:15:42,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:15:42,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:15:42,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:15:42,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:15:42,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:15:42,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:15:42,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:15:42,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:15:42,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:15:42,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:15:42,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:15:42,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:15:42,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:15:42,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:15:42,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:15:42,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:15:42,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:15:42,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:15:42,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:15:42,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:15:42,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:15:42,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:15:42,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:15:42,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:15:42,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:15:42,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:15:42,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:15:42,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:15:42,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:15:42,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:15:42,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:15:42,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:15:42,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:15:42,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 21:15:42,463 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:15:42,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:15:42,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:15:42,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:15:42,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:15:42,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:15:42,465 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:15:42,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:15:42,466 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:15:42,466 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:15:42,467 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:15:42,467 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:15:42,468 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:15:42,468 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:15:42,468 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:15:42,468 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:15:42,469 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:15:42,469 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:15:42,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:15:42,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:15:42,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:15:42,470 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:15:42,471 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:15:42,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:15:42,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:15:42,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:15:42,472 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:15:42,472 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:15:42,472 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:15:42,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:15:42,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:15:42,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:15:42,473 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:15:42,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:15:42,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:15:42,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:15:42,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:15:42,474 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:15:42,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:15:42,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:15:42,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:15:42,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:15:42,476 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_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-11-20 21:15:42,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:15:42,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:15:42,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:15:42,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:15:42,793 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:15:42,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-20 21:15:45,883 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:15:46,180 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:15:46,180 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-20 21:15:46,193 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/data/b4f4238c5/64e8e63ad9d345b3814d4ab93ceb9112/FLAG3fc8bccde [2022-11-20 21:15:46,208 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/data/b4f4238c5/64e8e63ad9d345b3814d4ab93ceb9112 [2022-11-20 21:15:46,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:15:46,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:15:46,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:15:46,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:15:46,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:15:46,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2d1cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46, skipping insertion in model container [2022-11-20 21:15:46,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:15:46,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:15:46,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:15:46,722 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:15:46,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:15:46,832 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:15:46,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46 WrapperNode [2022-11-20 21:15:46,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:15:46,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:15:46,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:15:46,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:15:46,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,897 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-11-20 21:15:46,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:15:46,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:15:46,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:15:46,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:15:46,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,936 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:15:46,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:15:46,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:15:46,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:15:46,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (1/1) ... [2022-11-20 21:15:46,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:15:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:46,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:15:46,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:15:47,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:15:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-20 21:15:47,034 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-20 21:15:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:15:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:15:47,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 21:15:47,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:15:47,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 21:15:47,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:15:47,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:15:47,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:15:47,193 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:15:47,195 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:15:47,498 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:15:47,528 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:15:47,529 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 21:15:47,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:15:47 BoogieIcfgContainer [2022-11-20 21:15:47,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:15:47,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:15:47,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:15:47,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:15:47,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:15:46" (1/3) ... [2022-11-20 21:15:47,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa922e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:15:47, skipping insertion in model container [2022-11-20 21:15:47,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:15:46" (2/3) ... [2022-11-20 21:15:47,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa922e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:15:47, skipping insertion in model container [2022-11-20 21:15:47,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:15:47" (3/3) ... [2022-11-20 21:15:47,553 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-11-20 21:15:47,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:15:47,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-20 21:15:47,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:15:47,657 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;@28d2f7f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:15:47,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-20 21:15:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 21:15:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:15:47,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:47,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:15:47,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:15:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2022-11-20 21:15:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:47,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197955748] [2022-11-20 21:15:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:47,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:48,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197955748] [2022-11-20 21:15:48,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197955748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:48,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:48,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:15:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688673635] [2022-11-20 21:15:48,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:48,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:15:48,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:15:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:15:48,174 INFO L87 Difference]: Start difference. First operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:48,331 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2022-11-20 21:15:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:15:48,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 21:15:48,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:48,343 INFO L225 Difference]: With dead ends: 118 [2022-11-20 21:15:48,343 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 21:15:48,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:15:48,348 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:48,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 112 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:48,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 21:15:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2022-11-20 21:15:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 79 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 21:15:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-11-20 21:15:48,401 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 5 [2022-11-20 21:15:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:48,402 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-11-20 21:15:48,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-11-20 21:15:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:15:48,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:48,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:15:48,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:15:48,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:15:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2022-11-20 21:15:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:48,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868020802] [2022-11-20 21:15:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:48,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:48,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868020802] [2022-11-20 21:15:48,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868020802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:48,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:48,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:15:48,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835920164] [2022-11-20 21:15:48,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:48,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:15:48,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:15:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:15:48,658 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:48,811 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-11-20 21:15:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:15:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 21:15:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:48,815 INFO L225 Difference]: With dead ends: 214 [2022-11-20 21:15:48,815 INFO L226 Difference]: Without dead ends: 214 [2022-11-20 21:15:48,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:48,817 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:48,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 197 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-20 21:15:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2022-11-20 21:15:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.6484375) internal successors, (211), 145 states have internal predecessors, (211), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-20 21:15:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 256 transitions. [2022-11-20 21:15:48,838 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 256 transitions. Word has length 5 [2022-11-20 21:15:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:48,839 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 256 transitions. [2022-11-20 21:15:48,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 256 transitions. [2022-11-20 21:15:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:15:48,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:48,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:15:48,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:15:48,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:15:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:48,842 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2022-11-20 21:15:48,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:48,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467739128] [2022-11-20 21:15:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:48,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:49,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:49,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467739128] [2022-11-20 21:15:49,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467739128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:49,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:49,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:15:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149179957] [2022-11-20 21:15:49,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:49,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:15:49,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:15:49,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:15:49,186 INFO L87 Difference]: Start difference. First operand 163 states and 256 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:49,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:49,479 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2022-11-20 21:15:49,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:15:49,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 6 [2022-11-20 21:15:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:49,483 INFO L225 Difference]: With dead ends: 237 [2022-11-20 21:15:49,483 INFO L226 Difference]: Without dead ends: 237 [2022-11-20 21:15:49,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:49,484 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 134 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:49,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 154 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:15:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-20 21:15:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 166. [2022-11-20 21:15:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.633587786259542) internal successors, (214), 148 states have internal predecessors, (214), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-20 21:15:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 259 transitions. [2022-11-20 21:15:49,529 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 259 transitions. Word has length 6 [2022-11-20 21:15:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:49,529 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 259 transitions. [2022-11-20 21:15:49,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 259 transitions. [2022-11-20 21:15:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:15:49,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:49,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:49,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:15:49,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:15:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2022-11-20 21:15:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:49,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741070690] [2022-11-20 21:15:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:49,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:49,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:49,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741070690] [2022-11-20 21:15:49,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741070690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:49,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:49,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:15:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91488501] [2022-11-20 21:15:49,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:49,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:15:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:15:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:15:49,847 INFO L87 Difference]: Start difference. First operand 166 states and 259 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:49,989 INFO L93 Difference]: Finished difference Result 216 states and 302 transitions. [2022-11-20 21:15:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:15:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-11-20 21:15:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:49,992 INFO L225 Difference]: With dead ends: 216 [2022-11-20 21:15:49,992 INFO L226 Difference]: Without dead ends: 216 [2022-11-20 21:15:49,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:49,993 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 119 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:49,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-20 21:15:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2022-11-20 21:15:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.618320610687023) internal successors, (212), 148 states have internal predecessors, (212), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-20 21:15:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 257 transitions. [2022-11-20 21:15:50,008 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 257 transitions. Word has length 7 [2022-11-20 21:15:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:50,009 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 257 transitions. [2022-11-20 21:15:50,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 257 transitions. [2022-11-20 21:15:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:15:50,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:50,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:50,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:15:50,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:15:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2022-11-20 21:15:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:50,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520598246] [2022-11-20 21:15:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:50,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520598246] [2022-11-20 21:15:50,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520598246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:50,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:50,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:15:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554202646] [2022-11-20 21:15:50,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:50,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:15:50,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:50,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:15:50,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:15:50,085 INFO L87 Difference]: Start difference. First operand 166 states and 257 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:50,197 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2022-11-20 21:15:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:15:50,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-20 21:15:50,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:50,200 INFO L225 Difference]: With dead ends: 244 [2022-11-20 21:15:50,200 INFO L226 Difference]: Without dead ends: 244 [2022-11-20 21:15:50,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:50,202 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 175 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:50,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-20 21:15:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2022-11-20 21:15:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 164 states have (on average 1.5914634146341464) internal successors, (261), 182 states have internal predecessors, (261), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-20 21:15:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 306 transitions. [2022-11-20 21:15:50,216 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 306 transitions. Word has length 8 [2022-11-20 21:15:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:50,216 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 306 transitions. [2022-11-20 21:15:50,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 306 transitions. [2022-11-20 21:15:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:15:50,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:50,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:50,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:15:50,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:15:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2022-11-20 21:15:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:50,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046746813] [2022-11-20 21:15:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:50,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:50,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:50,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046746813] [2022-11-20 21:15:50,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046746813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:50,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:50,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:15:50,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189888592] [2022-11-20 21:15:50,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:50,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:15:50,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:50,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:15:50,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:15:50,336 INFO L87 Difference]: Start difference. First operand 201 states and 306 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:50,434 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2022-11-20 21:15:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:15:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-20 21:15:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:50,436 INFO L225 Difference]: With dead ends: 239 [2022-11-20 21:15:50,436 INFO L226 Difference]: Without dead ends: 239 [2022-11-20 21:15:50,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:50,438 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 156 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:50,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 182 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:15:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-20 21:15:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2022-11-20 21:15:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 173 states have (on average 1.583815028901734) internal successors, (274), 192 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-20 21:15:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 319 transitions. [2022-11-20 21:15:50,451 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 319 transitions. Word has length 9 [2022-11-20 21:15:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:50,451 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 319 transitions. [2022-11-20 21:15:50,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 319 transitions. [2022-11-20 21:15:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:15:50,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:50,453 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:50,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:15:50,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:15:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2022-11-20 21:15:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677760190] [2022-11-20 21:15:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:50,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:50,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677760190] [2022-11-20 21:15:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677760190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:50,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990878119] [2022-11-20 21:15:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:50,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:50,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:50,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:15:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:15:50,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:51,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:15:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:51,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990878119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:15:51,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641878530] [2022-11-20 21:15:51,155 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-20 21:15:51,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:15:51,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:15:51,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:15:51,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:15:51,269 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-20 21:15:54,254 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:15:57,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2449#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (<= 0 ~global~0.base) (<= |parse_input_~input#1.base| 3) (= |parse_input_#in~input#1.base| 3) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= ~global~0.base 0) (= |old(~global~0.base)| 0) (= |#NULL.offset| 0) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:15:57,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:15:57,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:15:57,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-11-20 21:15:57,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241009686] [2022-11-20 21:15:57,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:15:57,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 21:15:57,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:15:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 21:15:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:15:57,849 INFO L87 Difference]: Start difference. First operand 211 states and 319 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:58,192 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2022-11-20 21:15:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:15:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:15:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:58,194 INFO L225 Difference]: With dead ends: 293 [2022-11-20 21:15:58,195 INFO L226 Difference]: Without dead ends: 293 [2022-11-20 21:15:58,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:15:58,196 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 406 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:58,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 381 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:15:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-20 21:15:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 223. [2022-11-20 21:15:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 182 states have (on average 1.5054945054945055) internal successors, (274), 204 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2022-11-20 21:15:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 329 transitions. [2022-11-20 21:15:58,209 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 329 transitions. Word has length 13 [2022-11-20 21:15:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:58,210 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 329 transitions. [2022-11-20 21:15:58,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 329 transitions. [2022-11-20 21:15:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:15:58,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:58,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:58,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:58,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 21:15:58,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:15:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:58,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2022-11-20 21:15:58,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:15:58,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920862560] [2022-11-20 21:15:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:58,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:15:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:58,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:15:58,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920862560] [2022-11-20 21:15:58,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920862560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:15:58,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713260072] [2022-11-20 21:15:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:58,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:58,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:58,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:58,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:15:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:15:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:58,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:15:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:58,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:15:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:58,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713260072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:15:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137760372] [2022-11-20 21:15:58,951 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-20 21:15:58,951 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:15:58,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:15:58,952 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:15:58,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:15:59,005 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-20 21:16:00,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:16:05,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2137760372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:16:05,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:16:05,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 18 [2022-11-20 21:16:05,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011157430] [2022-11-20 21:16:05,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:16:05,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:16:05,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:16:05,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:16:05,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:16:05,284 INFO L87 Difference]: Start difference. First operand 223 states and 329 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:16:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:16:06,356 INFO L93 Difference]: Finished difference Result 211 states and 290 transitions. [2022-11-20 21:16:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:16:06,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 14 [2022-11-20 21:16:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:16:06,359 INFO L225 Difference]: With dead ends: 211 [2022-11-20 21:16:06,359 INFO L226 Difference]: Without dead ends: 211 [2022-11-20 21:16:06,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-20 21:16:06,360 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 45 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:16:06,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 129 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:16:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-20 21:16:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-11-20 21:16:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.485207100591716) internal successors, (251), 192 states have internal predecessors, (251), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-20 21:16:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 284 transitions. [2022-11-20 21:16:06,370 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 284 transitions. Word has length 14 [2022-11-20 21:16:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:16:06,370 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 284 transitions. [2022-11-20 21:16:06,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:16:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 284 transitions. [2022-11-20 21:16:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 21:16:06,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:16:06,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:16:06,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 21:16:06,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 21:16:06,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:16:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:16:06,578 INFO L85 PathProgramCache]: Analyzing trace with hash 351522922, now seen corresponding path program 1 times [2022-11-20 21:16:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:16:06,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936561276] [2022-11-20 21:16:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:06,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:16:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:06,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:16:06,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936561276] [2022-11-20 21:16:06,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936561276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:16:06,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:16:06,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:16:06,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389142184] [2022-11-20 21:16:06,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:16:06,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:16:06,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:16:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:16:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:16:06,649 INFO L87 Difference]: Start difference. First operand 205 states and 284 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:16:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:16:06,660 INFO L93 Difference]: Finished difference Result 211 states and 288 transitions. [2022-11-20 21:16:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:16:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-11-20 21:16:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:16:06,663 INFO L225 Difference]: With dead ends: 211 [2022-11-20 21:16:06,663 INFO L226 Difference]: Without dead ends: 211 [2022-11-20 21:16:06,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:16:06,664 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:16:06,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 112 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:16:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-20 21:16:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-11-20 21:16:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.467455621301775) internal successors, (248), 192 states have internal predecessors, (248), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-20 21:16:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 281 transitions. [2022-11-20 21:16:06,672 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 281 transitions. Word has length 23 [2022-11-20 21:16:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:16:06,672 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 281 transitions. [2022-11-20 21:16:06,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:16:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 281 transitions. [2022-11-20 21:16:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 21:16:06,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:16:06,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:16:06,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 21:16:06,674 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:16:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:16:06,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1643273810, now seen corresponding path program 1 times [2022-11-20 21:16:06,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:16:06,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439138006] [2022-11-20 21:16:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:06,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:16:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:06,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:16:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439138006] [2022-11-20 21:16:06,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439138006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215213691] [2022-11-20 21:16:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:06,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:16:06,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:16:06,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:16:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:07,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:16:07,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:16:07,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:16:07,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:16:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:07,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:16:07,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215213691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:07,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100956315] [2022-11-20 21:16:07,606 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 21:16:07,606 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:16:07,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:16:07,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:16:07,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:16:07,744 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-20 21:16:07,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-20 21:16:08,017 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:16:08,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:16:08,361 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-20 21:16:09,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:16:22,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4017#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0))' at error location [2022-11-20 21:16:22,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:16:22,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:16:22,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2022-11-20 21:16:22,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267783365] [2022-11-20 21:16:22,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:16:22,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:16:22,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:16:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:16:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 21:16:22,582 INFO L87 Difference]: Start difference. First operand 205 states and 281 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:16:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:16:23,395 INFO L93 Difference]: Finished difference Result 392 states and 514 transitions. [2022-11-20 21:16:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:16:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-11-20 21:16:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:16:23,399 INFO L225 Difference]: With dead ends: 392 [2022-11-20 21:16:23,400 INFO L226 Difference]: Without dead ends: 392 [2022-11-20 21:16:23,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=401, Invalid=1669, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 21:16:23,401 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 639 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:16:23,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 309 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 267 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-11-20 21:16:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-20 21:16:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 286. [2022-11-20 21:16:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 245 states have (on average 1.5142857142857142) internal successors, (371), 269 states have internal predecessors, (371), 9 states have call successors, (9), 7 states have call predecessors, (9), 14 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-20 21:16:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 410 transitions. [2022-11-20 21:16:23,416 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 410 transitions. Word has length 25 [2022-11-20 21:16:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:16:23,417 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 410 transitions. [2022-11-20 21:16:23,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:16:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 410 transitions. [2022-11-20 21:16:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 21:16:23,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:16:23,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:16:23,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:16:23,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:23,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:16:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:16:23,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1123038032, now seen corresponding path program 1 times [2022-11-20 21:16:23,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:16:23,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976504035] [2022-11-20 21:16:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:23,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:16:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:23,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:16:23,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976504035] [2022-11-20 21:16:23,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976504035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227811885] [2022-11-20 21:16:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:23,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:23,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:16:23,790 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:16:23,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:16:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:23,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:16:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:16:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:23,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:16:23,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227811885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:16:23,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:16:23,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-11-20 21:16:23,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941846447] [2022-11-20 21:16:23,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:16:23,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:16:23,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:16:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:16:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:16:23,990 INFO L87 Difference]: Start difference. First operand 286 states and 410 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:16:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:16:24,080 INFO L93 Difference]: Finished difference Result 376 states and 524 transitions. [2022-11-20 21:16:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:16:24,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 26 [2022-11-20 21:16:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:16:24,084 INFO L225 Difference]: With dead ends: 376 [2022-11-20 21:16:24,084 INFO L226 Difference]: Without dead ends: 376 [2022-11-20 21:16:24,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:16:24,085 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 129 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:16:24,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 141 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:16:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-20 21:16:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 307. [2022-11-20 21:16:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 266 states have (on average 1.5263157894736843) internal successors, (406), 290 states have internal predecessors, (406), 9 states have call successors, (9), 7 states have call predecessors, (9), 14 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-20 21:16:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 445 transitions. [2022-11-20 21:16:24,109 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 445 transitions. Word has length 26 [2022-11-20 21:16:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:16:24,111 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 445 transitions. [2022-11-20 21:16:24,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:16:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 445 transitions. [2022-11-20 21:16:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:16:24,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:16:24,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:16:24,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:16:24,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:24,319 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:16:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:16:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1361832013, now seen corresponding path program 1 times [2022-11-20 21:16:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:16:24,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920780077] [2022-11-20 21:16:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:24,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:16:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:24,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:16:24,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920780077] [2022-11-20 21:16:24,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920780077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:24,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909159652] [2022-11-20 21:16:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:24,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:24,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:16:24,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:16:24,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:16:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 21:16:25,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:16:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:16:25,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:16:25,538 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 [2022-11-20 21:16:25,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:16:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:25,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:16:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909159652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:25,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039782244] [2022-11-20 21:16:25,745 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 21:16:25,745 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:16:25,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:16:25,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:16:25,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:16:25,903 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-20 21:16:25,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-20 21:16:26,189 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:16:26,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:16:26,443 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-20 21:16:27,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:16:40,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5626#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-20 21:16:40,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:16:40,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:16:40,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-11-20 21:16:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184215016] [2022-11-20 21:16:40,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:16:40,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 21:16:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:16:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 21:16:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 21:16:40,539 INFO L87 Difference]: Start difference. First operand 307 states and 445 transitions. Second operand has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:16:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:16:41,526 INFO L93 Difference]: Finished difference Result 485 states and 650 transitions. [2022-11-20 21:16:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:16:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-20 21:16:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:16:41,532 INFO L225 Difference]: With dead ends: 485 [2022-11-20 21:16:41,532 INFO L226 Difference]: Without dead ends: 485 [2022-11-20 21:16:41,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=520, Invalid=2130, Unknown=2, NotChecked=0, Total=2652 [2022-11-20 21:16:41,534 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 307 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:16:41,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 495 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 469 Invalid, 0 Unknown, 107 Unchecked, 0.4s Time] [2022-11-20 21:16:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-20 21:16:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 372. [2022-11-20 21:16:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 328 states have (on average 1.5060975609756098) internal successors, (494), 353 states have internal predecessors, (494), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-20 21:16:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 533 transitions. [2022-11-20 21:16:41,551 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 533 transitions. Word has length 27 [2022-11-20 21:16:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:16:41,551 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 533 transitions. [2022-11-20 21:16:41,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:16:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 533 transitions. [2022-11-20 21:16:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 21:16:41,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:16:41,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:16:41,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:16:41,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 21:16:41,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:16:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:16:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash -732880510, now seen corresponding path program 1 times [2022-11-20 21:16:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:16:41,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006340227] [2022-11-20 21:16:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:41,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:16:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:41,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:16:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006340227] [2022-11-20 21:16:41,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006340227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271700509] [2022-11-20 21:16:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:41,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:41,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:16:41,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:16:41,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:16:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:16:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:16:42,142 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:16:42,142 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 17 treesize of output 21 [2022-11-20 21:16:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:42,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:16:42,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271700509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:42,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1102314644] [2022-11-20 21:16:42,253 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 21:16:42,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:16:42,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:16:42,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:16:42,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:16:42,384 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-20 21:16:42,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-20 21:16:42,631 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:16:42,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:16:42,887 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-20 21:16:43,739 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:16:56,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6646#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-20 21:16:56,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:16:56,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:16:56,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-20 21:16:56,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23982292] [2022-11-20 21:16:56,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:16:56,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:16:56,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:16:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:16:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2022-11-20 21:16:56,347 INFO L87 Difference]: Start difference. First operand 372 states and 533 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:16:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:16:56,766 INFO L93 Difference]: Finished difference Result 424 states and 567 transitions. [2022-11-20 21:16:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:16:56,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-20 21:16:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:16:56,770 INFO L225 Difference]: With dead ends: 424 [2022-11-20 21:16:56,770 INFO L226 Difference]: Without dead ends: 424 [2022-11-20 21:16:56,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 21:16:56,771 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 502 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:16:56,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 336 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 169 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-20 21:16:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-20 21:16:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 372. [2022-11-20 21:16:56,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 328 states have (on average 1.475609756097561) internal successors, (484), 353 states have internal predecessors, (484), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-20 21:16:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 523 transitions. [2022-11-20 21:16:56,785 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 523 transitions. Word has length 28 [2022-11-20 21:16:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:16:56,785 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 523 transitions. [2022-11-20 21:16:56,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:16:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 523 transitions. [2022-11-20 21:16:56,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 21:16:56,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:16:56,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:16:56,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:16:57,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:57,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:16:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:16:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1244459281, now seen corresponding path program 1 times [2022-11-20 21:16:57,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:16:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229200911] [2022-11-20 21:16:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:57,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:16:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:57,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:16:57,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229200911] [2022-11-20 21:16:57,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229200911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:57,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264494713] [2022-11-20 21:16:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:16:57,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:16:57,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:16:57,277 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:16:57,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:16:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:16:57,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:16:57,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:16:57,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:16:57,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:16:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:57,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:16:57,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264494713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:16:57,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064317620] [2022-11-20 21:16:57,724 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 21:16:57,724 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:16:57,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:16:57,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:16:57,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:16:57,854 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-20 21:16:57,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-20 21:16:58,100 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:16:58,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:16:58,405 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-20 21:16:59,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:12,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7606#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (not (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|))) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-20 21:17:12,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:12,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:17:12,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-20 21:17:12,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582125010] [2022-11-20 21:17:12,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:12,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 21:17:12,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 21:17:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 21:17:12,083 INFO L87 Difference]: Start difference. First operand 372 states and 523 transitions. Second operand has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:17:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:12,723 INFO L93 Difference]: Finished difference Result 448 states and 575 transitions. [2022-11-20 21:17:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:17:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-20 21:17:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:12,725 INFO L225 Difference]: With dead ends: 448 [2022-11-20 21:17:12,725 INFO L226 Difference]: Without dead ends: 448 [2022-11-20 21:17:12,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 21:17:12,727 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 383 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:12,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 411 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 335 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-11-20 21:17:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-20 21:17:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 392. [2022-11-20 21:17:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 346 states have (on average 1.4739884393063585) internal successors, (510), 373 states have internal predecessors, (510), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-20 21:17:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 549 transitions. [2022-11-20 21:17:12,738 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 549 transitions. Word has length 29 [2022-11-20 21:17:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:12,739 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 549 transitions. [2022-11-20 21:17:12,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:17:12,739 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 549 transitions. [2022-11-20 21:17:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 21:17:12,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:12,740 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:12,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:12,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 21:17:12,946 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:17:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1727568309, now seen corresponding path program 1 times [2022-11-20 21:17:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:12,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406574178] [2022-11-20 21:17:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:12,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:13,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406574178] [2022-11-20 21:17:13,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406574178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535485293] [2022-11-20 21:17:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:13,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:13,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:17:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:13,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:17:13,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:13,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:17:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:13,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:17,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535485293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:17,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026505077] [2022-11-20 21:17:17,948 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-20 21:17:17,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:17,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:17,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:17,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:18,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,181 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:17:18,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:17:18,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,262 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:17:18,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:17:18,707 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-20 21:17:18,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,935 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:17:18,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:17:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:18,985 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-20 21:17:18,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 21:17:19,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:22,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8643#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:22,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:22,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:17:22,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-20 21:17:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963246265] [2022-11-20 21:17:22,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:17:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:17:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1312, Unknown=5, NotChecked=0, Total=1482 [2022-11-20 21:17:22,758 INFO L87 Difference]: Start difference. First operand 392 states and 549 transitions. Second operand has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:17:23,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:23,646 INFO L93 Difference]: Finished difference Result 448 states and 578 transitions. [2022-11-20 21:17:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 21:17:23,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-20 21:17:23,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:23,649 INFO L225 Difference]: With dead ends: 448 [2022-11-20 21:17:23,649 INFO L226 Difference]: Without dead ends: 448 [2022-11-20 21:17:23,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=333, Invalid=2212, Unknown=5, NotChecked=0, Total=2550 [2022-11-20 21:17:23,650 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 504 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:23,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 391 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 405 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-11-20 21:17:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-20 21:17:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 279. [2022-11-20 21:17:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 244 states have (on average 1.4426229508196722) internal successors, (352), 266 states have internal predecessors, (352), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-20 21:17:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 373 transitions. [2022-11-20 21:17:23,662 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 373 transitions. Word has length 33 [2022-11-20 21:17:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:23,662 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 373 transitions. [2022-11-20 21:17:23,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:17:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 373 transitions. [2022-11-20 21:17:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 21:17:23,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:23,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:23,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 21:17:23,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 21:17:23,870 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:17:23,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:23,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2015009977, now seen corresponding path program 1 times [2022-11-20 21:17:23,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:23,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150016672] [2022-11-20 21:17:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:23,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:24,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:24,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150016672] [2022-11-20 21:17:24,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150016672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:24,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756415790] [2022-11-20 21:17:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:24,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:24,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:24,207 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:24,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:17:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:17:24,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:24,552 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:17:24,554 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 17 treesize of output 21 [2022-11-20 21:17:24,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:17:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:24,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:24,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756415790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:24,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243028136] [2022-11-20 21:17:24,831 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-20 21:17:24,831 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:24,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:24,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:24,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:24,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:25,012 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-20 21:17:25,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-20 21:17:25,116 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-20 21:17:25,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-20 21:17:25,636 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-20 21:17:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:26,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:26,041 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:17:26,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:17:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:26,098 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-20 21:17:26,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-20 21:17:26,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:29,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9575#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:29,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:29,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:17:29,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-20 21:17:29,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462123778] [2022-11-20 21:17:29,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:29,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:17:29,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:29,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:17:29,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1233, Unknown=1, NotChecked=0, Total=1406 [2022-11-20 21:17:29,768 INFO L87 Difference]: Start difference. First operand 279 states and 373 transitions. Second operand has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:17:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:30,395 INFO L93 Difference]: Finished difference Result 350 states and 441 transitions. [2022-11-20 21:17:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 21:17:30,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-11-20 21:17:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:30,397 INFO L225 Difference]: With dead ends: 350 [2022-11-20 21:17:30,397 INFO L226 Difference]: Without dead ends: 350 [2022-11-20 21:17:30,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=302, Invalid=1953, Unknown=1, NotChecked=0, Total=2256 [2022-11-20 21:17:30,398 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 355 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:30,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 481 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 341 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-11-20 21:17:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-20 21:17:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 279. [2022-11-20 21:17:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 244 states have (on average 1.4344262295081966) internal successors, (350), 266 states have internal predecessors, (350), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-20 21:17:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 371 transitions. [2022-11-20 21:17:30,410 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 371 transitions. Word has length 34 [2022-11-20 21:17:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:30,410 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 371 transitions. [2022-11-20 21:17:30,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:17:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 371 transitions. [2022-11-20 21:17:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 21:17:30,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:30,412 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:30,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:30,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 21:17:30,631 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:17:30,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:30,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1959200108, now seen corresponding path program 1 times [2022-11-20 21:17:30,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:30,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814903598] [2022-11-20 21:17:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:30,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:31,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:31,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814903598] [2022-11-20 21:17:31,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814903598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365567704] [2022-11-20 21:17:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:31,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:31,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:31,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:31,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:17:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:31,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:17:31,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:31,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:31,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:17:31,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:17:31,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:17:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:31,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:32,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365567704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:32,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417313073] [2022-11-20 21:17:32,029 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-20 21:17:32,030 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:32,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:32,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:32,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:32,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:32,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:32,247 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:17:32,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:17:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:32,335 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:17:32,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:17:32,791 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-20 21:17:33,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:33,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:33,076 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:17:33,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:17:33,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:33,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:33,128 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-20 21:17:33,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 21:17:33,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:38,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10412#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:38,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:38,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:17:38,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2022-11-20 21:17:38,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771500091] [2022-11-20 21:17:38,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:38,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 21:17:38,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:38,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 21:17:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 21:17:38,093 INFO L87 Difference]: Start difference. First operand 279 states and 371 transitions. Second operand has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:17:39,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:39,410 INFO L93 Difference]: Finished difference Result 353 states and 430 transitions. [2022-11-20 21:17:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 21:17:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-20 21:17:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:39,412 INFO L225 Difference]: With dead ends: 353 [2022-11-20 21:17:39,412 INFO L226 Difference]: Without dead ends: 353 [2022-11-20 21:17:39,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 21:17:39,413 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 500 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:39,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 478 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 537 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2022-11-20 21:17:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-20 21:17:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 281. [2022-11-20 21:17:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 246 states have (on average 1.41869918699187) internal successors, (349), 268 states have internal predecessors, (349), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-20 21:17:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 370 transitions. [2022-11-20 21:17:39,422 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 370 transitions. Word has length 35 [2022-11-20 21:17:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:39,423 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 370 transitions. [2022-11-20 21:17:39,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:17:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 370 transitions. [2022-11-20 21:17:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 21:17:39,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:39,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:39,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-20 21:17:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:39,629 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:17:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash -724690043, now seen corresponding path program 1 times [2022-11-20 21:17:39,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:39,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071919773] [2022-11-20 21:17:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:39,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:39,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:39,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071919773] [2022-11-20 21:17:39,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071919773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:39,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795262325] [2022-11-20 21:17:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:39,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:39,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:39,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:39,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:17:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:17:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:39,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:39,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795262325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:39,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [202416400] [2022-11-20 21:17:39,906 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-20 21:17:39,906 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:39,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:39,906 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:39,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:40,015 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:17:40,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:17:40,037 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-20 21:17:40,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:17:40,380 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-20 21:17:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:40,588 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-20 21:17:40,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-20 21:17:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:40,772 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:17:40,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:17:40,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:45,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [202416400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:17:45,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:45,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-11-20 21:17:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147851539] [2022-11-20 21:17:45,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:17:45,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:17:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:17:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:17:45,727 INFO L87 Difference]: Start difference. First operand 281 states and 370 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:17:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:46,614 INFO L93 Difference]: Finished difference Result 360 states and 460 transitions. [2022-11-20 21:17:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 21:17:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 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 37 [2022-11-20 21:17:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:46,616 INFO L225 Difference]: With dead ends: 360 [2022-11-20 21:17:46,616 INFO L226 Difference]: Without dead ends: 360 [2022-11-20 21:17:46,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:17:46,617 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:46,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 169 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:17:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-20 21:17:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 340. [2022-11-20 21:17:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 300 states have (on average 1.39) internal successors, (417), 325 states have internal predecessors, (417), 7 states have call successors, (7), 7 states have call predecessors, (7), 15 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-11-20 21:17:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 445 transitions. [2022-11-20 21:17:46,626 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 445 transitions. Word has length 37 [2022-11-20 21:17:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:46,626 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 445 transitions. [2022-11-20 21:17:46,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:17:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 445 transitions. [2022-11-20 21:17:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 21:17:46,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:46,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:46,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:46,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 21:17:46,833 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:17:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1556026682, now seen corresponding path program 1 times [2022-11-20 21:17:46,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:46,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278172125] [2022-11-20 21:17:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:46,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:17:46,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278172125] [2022-11-20 21:17:46,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278172125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957986138] [2022-11-20 21:17:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:46,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:46,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:46,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:46,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:17:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:47,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:17:47,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:17:47,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:17:47,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957986138] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:47,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:17:47,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-11-20 21:17:47,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107374949] [2022-11-20 21:17:47,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:17:47,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:17:47,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:17:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:17:47,224 INFO L87 Difference]: Start difference. First operand 340 states and 445 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:17:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:47,266 INFO L93 Difference]: Finished difference Result 445 states and 574 transitions. [2022-11-20 21:17:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:17:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 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 38 [2022-11-20 21:17:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:47,269 INFO L225 Difference]: With dead ends: 445 [2022-11-20 21:17:47,269 INFO L226 Difference]: Without dead ends: 445 [2022-11-20 21:17:47,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:17:47,270 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 72 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:47,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 128 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:17:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-20 21:17:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 420. [2022-11-20 21:17:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 374 states have (on average 1.3770053475935828) internal successors, (515), 401 states have internal predecessors, (515), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-11-20 21:17:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 555 transitions. [2022-11-20 21:17:47,283 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 555 transitions. Word has length 38 [2022-11-20 21:17:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:47,283 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 555 transitions. [2022-11-20 21:17:47,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:17:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 555 transitions. [2022-11-20 21:17:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 21:17:47,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:47,284 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:47,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:47,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:47,491 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:17:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:47,491 INFO L85 PathProgramCache]: Analyzing trace with hash -990554755, now seen corresponding path program 1 times [2022-11-20 21:17:47,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:47,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306257909] [2022-11-20 21:17:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:47,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:47,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:47,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306257909] [2022-11-20 21:17:47,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306257909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:47,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510828024] [2022-11-20 21:17:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:47,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:47,577 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:47,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:17:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:47,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:17:47,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:47,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:47,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510828024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:47,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987553698] [2022-11-20 21:17:47,789 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:17:47,790 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:47,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:47,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:47,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:47,918 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:17:47,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:17:47,938 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-20 21:17:47,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:17:48,272 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-20 21:17:48,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:48,431 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:17:48,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:17:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:48,468 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-20 21:17:48,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:17:48,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:53,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13355#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (< ~global~0.base |#StackHeapBarrier|)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (<= |parse_input_#in~input#1.base| 4) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:53,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:53,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:53,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-20 21:17:53,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011693626] [2022-11-20 21:17:53,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:53,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:17:53,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:53,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:17:53,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:17:53,335 INFO L87 Difference]: Start difference. First operand 420 states and 555 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:17:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:53,409 INFO L93 Difference]: Finished difference Result 430 states and 562 transitions. [2022-11-20 21:17:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:17:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 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 38 [2022-11-20 21:17:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:53,412 INFO L225 Difference]: With dead ends: 430 [2022-11-20 21:17:53,412 INFO L226 Difference]: Without dead ends: 430 [2022-11-20 21:17:53,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:17:53,414 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 48 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:53,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:17:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-20 21:17:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 418. [2022-11-20 21:17:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 374 states have (on average 1.36096256684492) internal successors, (509), 399 states have internal predecessors, (509), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-11-20 21:17:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 549 transitions. [2022-11-20 21:17:53,428 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 549 transitions. Word has length 38 [2022-11-20 21:17:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:53,428 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 549 transitions. [2022-11-20 21:17:53,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:17:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 549 transitions. [2022-11-20 21:17:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 21:17:53,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:53,431 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-11-20 21:17:53,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:53,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:53,637 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:17:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash -642426233, now seen corresponding path program 1 times [2022-11-20 21:17:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:53,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871136403] [2022-11-20 21:17:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:53,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:53,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:53,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871136403] [2022-11-20 21:17:53,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871136403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:53,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534789691] [2022-11-20 21:17:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:53,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:53,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:53,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:53,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:17:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:17:53,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:53,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:17:53,969 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:17:53,969 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 17 treesize of output 21 [2022-11-20 21:17:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:53,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534789691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:54,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [975580698] [2022-11-20 21:17:54,153 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-20 21:17:54,153 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:54,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:54,155 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:54,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:54,272 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:17:54,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:17:54,296 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-20 21:17:54,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:17:54,648 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-20 21:17:54,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:54,812 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:17:54,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:17:54,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:17:54,838 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-20 21:17:54,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:17:54,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:00,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14458#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (<= |parse_input_#in~input#1.base| 4) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:00,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:00,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:00,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2022-11-20 21:18:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675392456] [2022-11-20 21:18:00,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:00,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:18:00,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:18:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:18:00,163 INFO L87 Difference]: Start difference. First operand 418 states and 549 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:18:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:00,237 INFO L93 Difference]: Finished difference Result 438 states and 567 transitions. [2022-11-20 21:18:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:18:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-11-20 21:18:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:00,240 INFO L225 Difference]: With dead ends: 438 [2022-11-20 21:18:00,240 INFO L226 Difference]: Without dead ends: 438 [2022-11-20 21:18:00,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-11-20 21:18:00,241 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 60 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:00,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 138 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-20 21:18:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-20 21:18:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 424. [2022-11-20 21:18:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 380 states have (on average 1.3605263157894736) internal successors, (517), 405 states have internal predecessors, (517), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-11-20 21:18:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 557 transitions. [2022-11-20 21:18:00,254 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 557 transitions. Word has length 39 [2022-11-20 21:18:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:00,255 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 557 transitions. [2022-11-20 21:18:00,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:18:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 557 transitions. [2022-11-20 21:18:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 21:18:00,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:00,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:00,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:00,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:00,467 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash 693025532, now seen corresponding path program 1 times [2022-11-20 21:18:00,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:00,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880297191] [2022-11-20 21:18:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:18:00,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:00,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880297191] [2022-11-20 21:18:00,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880297191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:00,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691086609] [2022-11-20 21:18:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:00,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:00,587 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:00,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 21:18:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:18:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:18:00,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:18:00,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691086609] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:00,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:18:00,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-11-20 21:18:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770778285] [2022-11-20 21:18:00,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:00,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:18:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:18:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:00,859 INFO L87 Difference]: Start difference. First operand 424 states and 557 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:18:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:00,915 INFO L93 Difference]: Finished difference Result 502 states and 646 transitions. [2022-11-20 21:18:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:18:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 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 40 [2022-11-20 21:18:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:00,921 INFO L225 Difference]: With dead ends: 502 [2022-11-20 21:18:00,922 INFO L226 Difference]: Without dead ends: 502 [2022-11-20 21:18:00,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:18:00,923 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 74 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:00,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 128 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:18:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-11-20 21:18:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 477. [2022-11-20 21:18:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 428 states have (on average 1.3574766355140186) internal successors, (581), 456 states have internal predecessors, (581), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2022-11-20 21:18:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 627 transitions. [2022-11-20 21:18:00,937 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 627 transitions. Word has length 40 [2022-11-20 21:18:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:00,937 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 627 transitions. [2022-11-20 21:18:00,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:18:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 627 transitions. [2022-11-20 21:18:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 21:18:00,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:00,938 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:00,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-20 21:18:01,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 21:18:01,145 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1106991010, now seen corresponding path program 1 times [2022-11-20 21:18:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:01,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731127619] [2022-11-20 21:18:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:01,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:18:01,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:01,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731127619] [2022-11-20 21:18:01,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731127619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:01,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:01,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:18:01,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934984929] [2022-11-20 21:18:01,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:01,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:18:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:18:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:18:01,213 INFO L87 Difference]: Start difference. First operand 477 states and 627 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:18:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:01,225 INFO L93 Difference]: Finished difference Result 351 states and 438 transitions. [2022-11-20 21:18:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:18:01,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 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 44 [2022-11-20 21:18:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:01,227 INFO L225 Difference]: With dead ends: 351 [2022-11-20 21:18:01,228 INFO L226 Difference]: Without dead ends: 351 [2022-11-20 21:18:01,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:18:01,228 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:01,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 94 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:18:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-20 21:18:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 333. [2022-11-20 21:18:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 299 states have (on average 1.3010033444816054) internal successors, (389), 316 states have internal predecessors, (389), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-11-20 21:18:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 420 transitions. [2022-11-20 21:18:01,241 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 420 transitions. Word has length 44 [2022-11-20 21:18:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:01,242 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 420 transitions. [2022-11-20 21:18:01,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:18:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 420 transitions. [2022-11-20 21:18:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 21:18:01,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:01,243 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:01,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 21:18:01,244 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash 78578931, now seen corresponding path program 1 times [2022-11-20 21:18:01,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:01,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565026267] [2022-11-20 21:18:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:01,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:01,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:01,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565026267] [2022-11-20 21:18:01,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565026267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:01,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446822387] [2022-11-20 21:18:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:01,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:01,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:01,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 21:18:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:01,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:18:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:01,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:01,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446822387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:01,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334942485] [2022-11-20 21:18:01,621 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-20 21:18:01,622 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:01,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:01,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:01,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:01,768 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-20 21:18:01,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-20 21:18:02,039 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:18:02,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:18:02,455 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:18:02,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:02,571 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:18:02,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:18:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:02,598 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-20 21:18:02,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:18:02,646 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:05,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17521#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:05,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:05,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:05,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-20 21:18:05,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886187581] [2022-11-20 21:18:05,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:05,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:18:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:18:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-11-20 21:18:05,313 INFO L87 Difference]: Start difference. First operand 333 states and 420 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:18:05,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:05,465 INFO L93 Difference]: Finished difference Result 335 states and 411 transitions. [2022-11-20 21:18:05,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:18:05,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-20 21:18:05,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:05,468 INFO L225 Difference]: With dead ends: 335 [2022-11-20 21:18:05,468 INFO L226 Difference]: Without dead ends: 335 [2022-11-20 21:18:05,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-11-20 21:18:05,469 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 125 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:05,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 207 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:18:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-20 21:18:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 317. [2022-11-20 21:18:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 285 states have (on average 1.2947368421052632) internal successors, (369), 300 states have internal predecessors, (369), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-20 21:18:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 395 transitions. [2022-11-20 21:18:05,483 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 395 transitions. Word has length 45 [2022-11-20 21:18:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:05,483 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 395 transitions. [2022-11-20 21:18:05,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:18:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 395 transitions. [2022-11-20 21:18:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 21:18:05,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:05,485 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:05,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:05,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 21:18:05,691 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:05,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash 16349608, now seen corresponding path program 1 times [2022-11-20 21:18:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:05,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51048167] [2022-11-20 21:18:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:05,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:18:06,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51048167] [2022-11-20 21:18:06,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51048167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925554239] [2022-11-20 21:18:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:06,074 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:06,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 21:18:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:18:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:06,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:06,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:18:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:18:06,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925554239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915504187] [2022-11-20 21:18:10,838 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:18:10,838 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:10,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:10,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:10,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:10,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:11,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:11,035 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-20 21:18:11,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-20 21:18:11,131 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-20 21:18:11,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-20 21:18:11,513 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:18:11,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:11,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:11,766 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:18:11,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:18:11,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:11,825 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-20 21:18:11,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-20 21:18:12,067 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:15,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18372#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_~input#1.base| 5) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-20 21:18:15,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:15,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:18:15,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-11-20 21:18:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615929980] [2022-11-20 21:18:15,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:15,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 21:18:15,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 21:18:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1010, Unknown=5, NotChecked=0, Total=1190 [2022-11-20 21:18:15,199 INFO L87 Difference]: Start difference. First operand 317 states and 395 transitions. Second operand has 15 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 21:18:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:15,949 INFO L93 Difference]: Finished difference Result 395 states and 470 transitions. [2022-11-20 21:18:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 21:18:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-11-20 21:18:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:15,951 INFO L225 Difference]: With dead ends: 395 [2022-11-20 21:18:15,951 INFO L226 Difference]: Without dead ends: 395 [2022-11-20 21:18:15,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=360, Invalid=1986, Unknown=6, NotChecked=0, Total=2352 [2022-11-20 21:18:15,953 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 424 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:15,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 189 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 220 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-11-20 21:18:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-20 21:18:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 362. [2022-11-20 21:18:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 327 states have (on average 1.305810397553517) internal successors, (427), 343 states have internal predecessors, (427), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-20 21:18:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 455 transitions. [2022-11-20 21:18:15,970 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 455 transitions. Word has length 46 [2022-11-20 21:18:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:15,970 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 455 transitions. [2022-11-20 21:18:15,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 21:18:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 455 transitions. [2022-11-20 21:18:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 21:18:15,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:15,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:15,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:16,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 21:18:16,179 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1705702260, now seen corresponding path program 1 times [2022-11-20 21:18:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:16,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646859250] [2022-11-20 21:18:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:16,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:18:16,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:16,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646859250] [2022-11-20 21:18:16,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646859250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:16,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696528544] [2022-11-20 21:18:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:16,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:16,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:16,243 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:16,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 21:18:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:18:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:18:16,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:16,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696528544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:16,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866961284] [2022-11-20 21:18:16,983 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:18:16,984 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:16,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:16,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:16,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:17,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:17,203 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:18:17,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:18:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:17,287 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:18:17,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:18:17,759 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-20 21:18:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:17,959 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:18:17,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:18:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:18,007 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-20 21:18:18,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 21:18:18,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:21,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [866961284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:21,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:21,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 5, 7] total 31 [2022-11-20 21:18:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265947642] [2022-11-20 21:18:21,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:21,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:18:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:18:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-11-20 21:18:21,761 INFO L87 Difference]: Start difference. First operand 362 states and 455 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:18:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:24,179 INFO L93 Difference]: Finished difference Result 369 states and 461 transitions. [2022-11-20 21:18:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 21:18:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 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 45 [2022-11-20 21:18:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:24,181 INFO L225 Difference]: With dead ends: 369 [2022-11-20 21:18:24,181 INFO L226 Difference]: Without dead ends: 369 [2022-11-20 21:18:24,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 21:18:24,182 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:24,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 176 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:18:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-20 21:18:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 320. [2022-11-20 21:18:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 288 states have (on average 1.3229166666666667) internal successors, (381), 303 states have internal predecessors, (381), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:18:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 405 transitions. [2022-11-20 21:18:24,190 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 405 transitions. Word has length 45 [2022-11-20 21:18:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:24,191 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 405 transitions. [2022-11-20 21:18:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:18:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 405 transitions. [2022-11-20 21:18:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 21:18:24,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:24,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:24,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:24,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 21:18:24,398 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117614, now seen corresponding path program 1 times [2022-11-20 21:18:24,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443413354] [2022-11-20 21:18:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:24,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:24,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443413354] [2022-11-20 21:18:24,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443413354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:24,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515065906] [2022-11-20 21:18:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:24,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:24,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:24,667 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:24,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 21:18:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:18:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:24,908 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:18:24,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 21:18:25,042 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:18:25,042 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 17 treesize of output 21 [2022-11-20 21:18:25,083 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:18:25,084 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 18 [2022-11-20 21:18:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:25,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:25,211 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:18:25,211 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 56 treesize of output 53 [2022-11-20 21:18:25,439 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:18:25,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-11-20 21:18:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:25,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515065906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722322123] [2022-11-20 21:18:25,626 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-20 21:18:25,626 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:25,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:25,626 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:25,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:25,758 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:18:25,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:18:25,778 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-20 21:18:25,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:18:25,877 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-20 21:18:25,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:18:26,212 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:18:26,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:26,327 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-20 21:18:26,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-20 21:18:26,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:26,454 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:18:26,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:18:26,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:26,612 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-20 21:18:26,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:18:26,640 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-20 21:18:26,713 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-20 21:18:26,774 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-20 21:18:26,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:30,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20495#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (not (= (select |#valid| |~#commands~0.base|) 1)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:30,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:30,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:30,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 25 [2022-11-20 21:18:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178614041] [2022-11-20 21:18:30,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:30,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 21:18:30,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 21:18:30,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 21:18:30,725 INFO L87 Difference]: Start difference. First operand 320 states and 405 transitions. Second operand has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 21:18:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:31,063 INFO L93 Difference]: Finished difference Result 325 states and 409 transitions. [2022-11-20 21:18:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:18:31,067 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-11-20 21:18:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:31,068 INFO L225 Difference]: With dead ends: 325 [2022-11-20 21:18:31,068 INFO L226 Difference]: Without dead ends: 325 [2022-11-20 21:18:31,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 21:18:31,069 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 357 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:31,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 132 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 188 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-11-20 21:18:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-20 21:18:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 319. [2022-11-20 21:18:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.3159722222222223) internal successors, (379), 302 states have internal predecessors, (379), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:18:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 403 transitions. [2022-11-20 21:18:31,078 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 403 transitions. Word has length 48 [2022-11-20 21:18:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:31,078 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 403 transitions. [2022-11-20 21:18:31,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 21:18:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 403 transitions. [2022-11-20 21:18:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 21:18:31,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:31,079 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:31,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:31,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 21:18:31,287 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:31,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117615, now seen corresponding path program 1 times [2022-11-20 21:18:31,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:31,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336321787] [2022-11-20 21:18:31,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:18:31,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:31,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336321787] [2022-11-20 21:18:31,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336321787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:18:31,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:18:31,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 21:18:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727848404] [2022-11-20 21:18:31,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:18:31,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:18:31,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:31,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:18:31,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:18:31,512 INFO L87 Difference]: Start difference. First operand 319 states and 403 transitions. Second operand has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:18:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:31,697 INFO L93 Difference]: Finished difference Result 399 states and 486 transitions. [2022-11-20 21:18:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:18:31,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-20 21:18:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:31,698 INFO L225 Difference]: With dead ends: 399 [2022-11-20 21:18:31,699 INFO L226 Difference]: Without dead ends: 399 [2022-11-20 21:18:31,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:18:31,699 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:31,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 72 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:18:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-20 21:18:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 319. [2022-11-20 21:18:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.3055555555555556) internal successors, (376), 302 states have internal predecessors, (376), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:18:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 400 transitions. [2022-11-20 21:18:31,707 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 400 transitions. Word has length 48 [2022-11-20 21:18:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:31,708 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 400 transitions. [2022-11-20 21:18:31,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:18:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 400 transitions. [2022-11-20 21:18:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 21:18:31,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:31,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:31,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 21:18:31,709 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1739820872, now seen corresponding path program 1 times [2022-11-20 21:18:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:31,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563868639] [2022-11-20 21:18:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:31,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:18:31,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563868639] [2022-11-20 21:18:31,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563868639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189672385] [2022-11-20 21:18:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:31,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:31,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:31,903 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:31,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 21:18:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:18:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:32,106 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:18:32,106 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 17 treesize of output 21 [2022-11-20 21:18:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:18:32,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:32,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189672385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:32,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [594528336] [2022-11-20 21:18:32,197 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:18:32,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:32,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:32,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:32,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:32,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:32,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:32,454 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-20 21:18:32,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-20 21:18:32,568 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-20 21:18:32,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-20 21:18:32,976 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:18:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:33,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:33,186 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:18:33,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:18:33,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:33,250 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-20 21:18:33,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-20 21:18:33,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:35,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22102#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:35,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:35,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:18:35,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2022-11-20 21:18:35,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741054233] [2022-11-20 21:18:35,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:35,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:18:35,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:35,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:18:35,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-20 21:18:35,749 INFO L87 Difference]: Start difference. First operand 319 states and 400 transitions. Second operand has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 21:18:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:36,057 INFO L93 Difference]: Finished difference Result 338 states and 409 transitions. [2022-11-20 21:18:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 21:18:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-20 21:18:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:36,059 INFO L225 Difference]: With dead ends: 338 [2022-11-20 21:18:36,059 INFO L226 Difference]: Without dead ends: 338 [2022-11-20 21:18:36,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 21:18:36,060 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 181 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:36,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 194 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 132 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-20 21:18:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-20 21:18:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 319. [2022-11-20 21:18:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.2986111111111112) internal successors, (374), 302 states have internal predecessors, (374), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:18:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 398 transitions. [2022-11-20 21:18:36,067 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 398 transitions. Word has length 49 [2022-11-20 21:18:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:36,067 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 398 transitions. [2022-11-20 21:18:36,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 21:18:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 398 transitions. [2022-11-20 21:18:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 21:18:36,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:36,068 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:36,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:36,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 21:18:36,269 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1702316402, now seen corresponding path program 2 times [2022-11-20 21:18:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:36,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297054429] [2022-11-20 21:18:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:36,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:18:36,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297054429] [2022-11-20 21:18:36,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297054429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019137502] [2022-11-20 21:18:36,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:18:36,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:36,466 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:36,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 21:18:36,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 21:18:36,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:18:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:18:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:36,662 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:18:36,662 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 17 treesize of output 21 [2022-11-20 21:18:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:18:36,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:36,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019137502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6406095] [2022-11-20 21:18:36,903 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:18:36,904 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:36,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:36,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:36,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:37,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:37,154 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:18:37,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:18:37,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:37,233 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:18:37,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:18:37,515 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:18:37,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:37,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:37,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:37,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:37,707 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:18:37,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:18:37,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:37,763 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-20 21:18:37,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-20 21:18:37,899 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:40,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23040#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:40,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:40,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:18:40,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-11-20 21:18:40,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744727512] [2022-11-20 21:18:40,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:40,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:18:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:18:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-11-20 21:18:40,283 INFO L87 Difference]: Start difference. First operand 319 states and 398 transitions. Second operand has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:18:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:41,021 INFO L93 Difference]: Finished difference Result 330 states and 405 transitions. [2022-11-20 21:18:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 21:18:41,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-20 21:18:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:41,023 INFO L225 Difference]: With dead ends: 330 [2022-11-20 21:18:41,023 INFO L226 Difference]: Without dead ends: 330 [2022-11-20 21:18:41,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 21:18:41,024 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 162 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:41,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 210 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 136 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 21:18:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-20 21:18:41,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 319. [2022-11-20 21:18:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.2951388888888888) internal successors, (373), 302 states have internal predecessors, (373), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:18:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 397 transitions. [2022-11-20 21:18:41,032 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 397 transitions. Word has length 49 [2022-11-20 21:18:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:41,032 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 397 transitions. [2022-11-20 21:18:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:18:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 397 transitions. [2022-11-20 21:18:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 21:18:41,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:41,033 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:41,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-20 21:18:41,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:41,239 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:41,240 INFO L85 PathProgramCache]: Analyzing trace with hash 276136575, now seen corresponding path program 1 times [2022-11-20 21:18:41,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:41,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714709411] [2022-11-20 21:18:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:42,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:42,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714709411] [2022-11-20 21:18:42,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714709411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:42,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93420806] [2022-11-20 21:18:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:42,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:42,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:42,111 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:42,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 21:18:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:42,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 21:18:42,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:42,468 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:18:42,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 21:18:42,750 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-20 21:18:42,750 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 21 treesize of output 29 [2022-11-20 21:18:42,811 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 21:18:42,811 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 16 treesize of output 26 [2022-11-20 21:18:42,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:18:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:42,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:43,127 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 21:18:43,128 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 178 treesize of output 165 [2022-11-20 21:18:43,442 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-11-20 21:18:43,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 101 [2022-11-20 21:18:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:43,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93420806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:43,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667599673] [2022-11-20 21:18:43,845 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-20 21:18:43,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:43,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:43,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:43,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:43,956 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:18:43,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:18:43,976 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-20 21:18:43,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:18:44,085 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-20 21:18:44,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:18:44,411 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:18:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:44,522 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-20 21:18:44,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-20 21:18:44,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:44,652 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:18:44,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:18:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:44,806 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-20 21:18:44,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:18:44,834 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-20 21:18:44,889 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-20 21:18:44,926 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-20 21:18:44,984 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:49,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24056#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:49,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:49,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:49,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14] total 42 [2022-11-20 21:18:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001471791] [2022-11-20 21:18:49,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:49,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 21:18:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 21:18:49,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 21:18:49,493 INFO L87 Difference]: Start difference. First operand 319 states and 397 transitions. Second operand has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 21:18:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:50,910 INFO L93 Difference]: Finished difference Result 395 states and 479 transitions. [2022-11-20 21:18:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 21:18:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-11-20 21:18:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:50,912 INFO L225 Difference]: With dead ends: 395 [2022-11-20 21:18:50,912 INFO L226 Difference]: Without dead ends: 395 [2022-11-20 21:18:50,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=845, Invalid=4705, Unknown=0, NotChecked=0, Total=5550 [2022-11-20 21:18:50,915 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 556 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:50,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 306 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 621 Invalid, 0 Unknown, 3 Unchecked, 0.5s Time] [2022-11-20 21:18:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-20 21:18:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 319. [2022-11-20 21:18:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.2881944444444444) internal successors, (371), 302 states have internal predecessors, (371), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:18:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 395 transitions. [2022-11-20 21:18:50,923 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 395 transitions. Word has length 49 [2022-11-20 21:18:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:50,924 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 395 transitions. [2022-11-20 21:18:50,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 21:18:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 395 transitions. [2022-11-20 21:18:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 21:18:50,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:50,925 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:50,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:51,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-20 21:18:51,135 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1900127767, now seen corresponding path program 1 times [2022-11-20 21:18:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516320165] [2022-11-20 21:18:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:18:51,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:51,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516320165] [2022-11-20 21:18:51,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516320165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:51,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491834834] [2022-11-20 21:18:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:51,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:51,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:51,423 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:51,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 21:18:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 21:18:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:51,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:18:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:18:51,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:51,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491834834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:51,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525668098] [2022-11-20 21:18:51,943 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:18:51,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:51,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:51,944 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:51,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,171 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:18:52,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:18:52,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,244 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:18:52,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:18:52,517 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:18:52,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,827 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:18:52,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:18:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:52,873 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-20 21:18:52,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 21:18:53,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:56,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25010#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-20 21:18:56,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:56,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:18:56,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-20 21:18:56,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031968721] [2022-11-20 21:18:56,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:56,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 21:18:56,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:56,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 21:18:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 21:18:56,379 INFO L87 Difference]: Start difference. First operand 319 states and 395 transitions. Second operand has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:18:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:56,811 INFO L93 Difference]: Finished difference Result 334 states and 397 transitions. [2022-11-20 21:18:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 21:18:56,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-20 21:18:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:56,813 INFO L225 Difference]: With dead ends: 334 [2022-11-20 21:18:56,813 INFO L226 Difference]: Without dead ends: 334 [2022-11-20 21:18:56,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 21:18:56,815 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 263 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:56,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 250 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 246 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-20 21:18:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-20 21:18:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 319. [2022-11-20 21:18:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.2673611111111112) internal successors, (365), 302 states have internal predecessors, (365), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:18:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 389 transitions. [2022-11-20 21:18:56,822 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 389 transitions. Word has length 50 [2022-11-20 21:18:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:56,822 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 389 transitions. [2022-11-20 21:18:56,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:18:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 389 transitions. [2022-11-20 21:18:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 21:18:56,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:56,824 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:56,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:57,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 21:18:57,030 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:18:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1232200959, now seen corresponding path program 2 times [2022-11-20 21:18:57,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:57,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041895173] [2022-11-20 21:18:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:18:57,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041895173] [2022-11-20 21:18:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041895173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649454038] [2022-11-20 21:18:57,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:18:57,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:57,283 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:57,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 21:18:57,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 21:18:57,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:18:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:18:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:57,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:18:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:18:57,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:57,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649454038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669871481] [2022-11-20 21:18:57,817 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:18:57,817 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:57,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:57,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:57,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:58,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:58,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:58,048 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-20 21:18:58,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-20 21:18:58,144 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-20 21:18:58,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-20 21:18:58,495 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:18:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:58,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:58,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:58,708 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:18:58,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:18:58,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:18:58,758 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-20 21:18:58,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 21:18:58,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:01,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25956#(and (<= |parse_input_~input#1.offset| 0) (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:01,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:01,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:19:01,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-11-20 21:19:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556911825] [2022-11-20 21:19:01,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:19:01,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:19:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 21:19:01,423 INFO L87 Difference]: Start difference. First operand 319 states and 389 transitions. Second operand has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:19:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:01,879 INFO L93 Difference]: Finished difference Result 328 states and 395 transitions. [2022-11-20 21:19:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 21:19:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2022-11-20 21:19:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:01,881 INFO L225 Difference]: With dead ends: 328 [2022-11-20 21:19:01,881 INFO L226 Difference]: Without dead ends: 328 [2022-11-20 21:19:01,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 21:19:01,883 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 285 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:01,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 252 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 238 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-20 21:19:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-20 21:19:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 319. [2022-11-20 21:19:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.2604166666666667) internal successors, (363), 302 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:19:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 387 transitions. [2022-11-20 21:19:01,890 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 387 transitions. Word has length 50 [2022-11-20 21:19:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:01,890 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 387 transitions. [2022-11-20 21:19:01,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:19:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 387 transitions. [2022-11-20 21:19:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 21:19:01,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:01,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-20 21:19:01,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-20 21:19:02,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:02,097 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:19:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash -920722335, now seen corresponding path program 1 times [2022-11-20 21:19:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:02,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113289856] [2022-11-20 21:19:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:02,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:02,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:02,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113289856] [2022-11-20 21:19:02,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113289856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:02,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630945075] [2022-11-20 21:19:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:02,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:02,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:02,551 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:02,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 21:19:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:02,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:19:02,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:02,751 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:19:02,752 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 17 treesize of output 21 [2022-11-20 21:19:02,852 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| Int) (v_ArrVal_205 Int)) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| 1) |c_old(~global~0.base)| v_ArrVal_205))) is different from true [2022-11-20 21:19:02,881 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 21:19:02,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 21:19:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-20 21:19:02,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:03,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630945075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:03,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1809290158] [2022-11-20 21:19:03,246 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-20 21:19:03,247 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:03,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:03,247 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:03,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:03,355 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:19:03,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:19:03,375 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-20 21:19:03,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:19:03,471 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-20 21:19:03,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:19:03,754 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:19:03,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:03,861 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:19:03,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:19:03,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:03,906 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-20 21:19:03,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:19:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:04,048 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-20 21:19:04,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:19:04,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:07,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26905#(and (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:07,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:07,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:19:07,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-20 21:19:07,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472773620] [2022-11-20 21:19:07,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:07,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:19:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:07,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:19:07,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1428, Unknown=1, NotChecked=78, Total=1722 [2022-11-20 21:19:07,276 INFO L87 Difference]: Start difference. First operand 319 states and 387 transitions. Second operand has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:19:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:08,205 INFO L93 Difference]: Finished difference Result 338 states and 398 transitions. [2022-11-20 21:19:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 21:19:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-11-20 21:19:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:08,207 INFO L225 Difference]: With dead ends: 338 [2022-11-20 21:19:08,207 INFO L226 Difference]: Without dead ends: 338 [2022-11-20 21:19:08,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=475, Invalid=2603, Unknown=6, NotChecked=108, Total=3192 [2022-11-20 21:19:08,208 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 391 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:08,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 353 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 206 Invalid, 0 Unknown, 152 Unchecked, 0.2s Time] [2022-11-20 21:19:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-20 21:19:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 287. [2022-11-20 21:19:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 260 states have (on average 1.2384615384615385) internal successors, (322), 272 states have internal predecessors, (322), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-20 21:19:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 342 transitions. [2022-11-20 21:19:08,215 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 342 transitions. Word has length 51 [2022-11-20 21:19:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:08,215 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 342 transitions. [2022-11-20 21:19:08,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:19:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 342 transitions. [2022-11-20 21:19:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 21:19:08,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:08,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:08,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:08,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:08,422 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:19:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1522378736, now seen corresponding path program 1 times [2022-11-20 21:19:08,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:08,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624416122] [2022-11-20 21:19:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:08,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:08,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624416122] [2022-11-20 21:19:08,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624416122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597367939] [2022-11-20 21:19:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:08,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:08,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:08,822 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:08,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 21:19:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 21:19:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:09,005 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_223 Int)) (= |c_#valid| (store |c_old(#valid)| |c_parse_input_c1_~x~0#1.base| v_ArrVal_223))) (exists ((v_ArrVal_224 Int)) (= (store |c_old(#length)| |c_parse_input_c1_~x~0#1.base| v_ArrVal_224) |c_#length|))) is different from true [2022-11-20 21:19:09,018 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_223 Int)) (= |c_#valid| (store |c_old(#valid)| c_~global~0.base v_ArrVal_223))) (exists ((v_ArrVal_224 Int)) (= (store |c_old(#length)| c_~global~0.base v_ArrVal_224) |c_#length|))) is different from true [2022-11-20 21:19:09,040 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:19:09,041 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 18 [2022-11-20 21:19:09,056 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:19:09,056 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 18 [2022-11-20 21:19:09,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:19:09,282 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:19:09,282 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 16 treesize of output 22 [2022-11-20 21:19:09,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:19:09,294 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 19 [2022-11-20 21:19:09,516 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:19:09,516 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-11-20 21:19:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-11-20 21:19:09,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:09,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 21:19:09,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597367939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:09,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183657721] [2022-11-20 21:19:09,789 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-20 21:19:09,789 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:09,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:09,789 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:09,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:09,888 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:19:09,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:19:09,907 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-20 21:19:09,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:19:10,018 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-20 21:19:10,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:19:10,300 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:19:10,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:10,397 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:19:10,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:19:10,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:10,418 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-20 21:19:10,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:19:10,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:10,552 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-20 21:19:10,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:19:10,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:14,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27796#(and (= (select |#valid| |parse_input_~input#1.base|) 1) (not (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|))) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:14,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:14,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:19:14,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2022-11-20 21:19:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163105174] [2022-11-20 21:19:14,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:14,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 21:19:14,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 21:19:14,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1932, Unknown=2, NotChecked=182, Total=2352 [2022-11-20 21:19:14,007 INFO L87 Difference]: Start difference. First operand 287 states and 342 transitions. Second operand has 25 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:19:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:16,030 INFO L93 Difference]: Finished difference Result 354 states and 409 transitions. [2022-11-20 21:19:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 21:19:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-11-20 21:19:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:16,032 INFO L225 Difference]: With dead ends: 354 [2022-11-20 21:19:16,032 INFO L226 Difference]: Without dead ends: 354 [2022-11-20 21:19:16,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=619, Invalid=4498, Unknown=3, NotChecked=282, Total=5402 [2022-11-20 21:19:16,033 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 484 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:16,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 535 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 423 Invalid, 0 Unknown, 642 Unchecked, 0.4s Time] [2022-11-20 21:19:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-20 21:19:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 249. [2022-11-20 21:19:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 225 states have (on average 1.208888888888889) internal successors, (272), 236 states have internal predecessors, (272), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 21:19:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 290 transitions. [2022-11-20 21:19:16,040 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 290 transitions. Word has length 52 [2022-11-20 21:19:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:16,041 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 290 transitions. [2022-11-20 21:19:16,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:19:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 290 transitions. [2022-11-20 21:19:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 21:19:16,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:16,042 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:16,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-20 21:19:16,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 21:19:16,248 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:19:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash -219031633, now seen corresponding path program 2 times [2022-11-20 21:19:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:16,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199240025] [2022-11-20 21:19:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:19:16,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199240025] [2022-11-20 21:19:16,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199240025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295709645] [2022-11-20 21:19:16,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:19:16,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:16,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:16,579 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:16,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 21:19:16,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:19:16,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:19:16,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:19:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:16,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 21:19:16,895 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:19:16,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 21:19:16,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:19:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:19:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:17,221 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:19:17,222 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 12 [2022-11-20 21:19:17,480 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:19:17,480 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 12 [2022-11-20 21:19:17,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 21:19:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:19:17,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295709645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005159246] [2022-11-20 21:19:17,715 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:19:17,715 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:17,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:17,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:17,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:17,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:17,970 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:19:17,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:19:17,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:18,037 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:19:18,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:19:18,313 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:19:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:18,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:18,620 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:19:18,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:19:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:18,663 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-20 21:19:18,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 21:19:18,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:22,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28822#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_~input#1.base| 5) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-20 21:19:22,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:22,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:22,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 29 [2022-11-20 21:19:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038131645] [2022-11-20 21:19:22,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 21:19:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 21:19:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1808, Unknown=9, NotChecked=0, Total=2162 [2022-11-20 21:19:22,246 INFO L87 Difference]: Start difference. First operand 249 states and 290 transitions. Second operand has 30 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 21:19:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:24,012 INFO L93 Difference]: Finished difference Result 391 states and 451 transitions. [2022-11-20 21:19:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 21:19:24,012 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2022-11-20 21:19:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:24,014 INFO L225 Difference]: With dead ends: 391 [2022-11-20 21:19:24,014 INFO L226 Difference]: Without dead ends: 391 [2022-11-20 21:19:24,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1149, Invalid=5321, Unknown=10, NotChecked=0, Total=6480 [2022-11-20 21:19:24,015 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 879 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:24,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 417 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 482 Invalid, 0 Unknown, 37 Unchecked, 0.5s Time] [2022-11-20 21:19:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-20 21:19:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 288. [2022-11-20 21:19:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.217557251908397) internal successors, (319), 273 states have internal predecessors, (319), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-20 21:19:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 339 transitions. [2022-11-20 21:19:24,023 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 339 transitions. Word has length 54 [2022-11-20 21:19:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:24,023 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 339 transitions. [2022-11-20 21:19:24,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 21:19:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 339 transitions. [2022-11-20 21:19:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 21:19:24,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:24,024 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:24,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:24,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 21:19:24,235 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:19:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:24,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1799953919, now seen corresponding path program 1 times [2022-11-20 21:19:24,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:24,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566060497] [2022-11-20 21:19:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:24,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:19:24,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:24,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566060497] [2022-11-20 21:19:24,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566060497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:24,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479943076] [2022-11-20 21:19:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:24,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:24,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:24,541 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:24,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 21:19:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 21:19:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:25,113 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:19:25,113 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 17 treesize of output 21 [2022-11-20 21:19:25,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:19:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:19:25,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:25,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479943076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:25,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [281258064] [2022-11-20 21:19:25,409 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:19:25,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:25,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:25,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:25,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:25,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:25,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:25,628 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-20 21:19:25,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-20 21:19:25,732 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-20 21:19:25,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-20 21:19:26,085 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:19:26,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:26,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:26,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:26,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:26,264 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:19:26,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:19:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:26,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:26,315 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-20 21:19:26,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-20 21:19:26,431 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:29,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29831#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:29,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:29,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:19:29,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2022-11-20 21:19:29,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989937559] [2022-11-20 21:19:29,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:29,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:19:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:29,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:19:29,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 21:19:29,311 INFO L87 Difference]: Start difference. First operand 288 states and 339 transitions. Second operand has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:19:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:29,869 INFO L93 Difference]: Finished difference Result 359 states and 417 transitions. [2022-11-20 21:19:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:19:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-11-20 21:19:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:29,871 INFO L225 Difference]: With dead ends: 359 [2022-11-20 21:19:29,872 INFO L226 Difference]: Without dead ends: 359 [2022-11-20 21:19:29,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 86 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 21:19:29,872 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 247 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:29,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 341 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 347 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-11-20 21:19:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-20 21:19:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 321. [2022-11-20 21:19:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.2191780821917808) internal successors, (356), 304 states have internal predecessors, (356), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:19:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 380 transitions. [2022-11-20 21:19:29,879 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 380 transitions. Word has length 55 [2022-11-20 21:19:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:29,880 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 380 transitions. [2022-11-20 21:19:29,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:19:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 380 transitions. [2022-11-20 21:19:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 21:19:29,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:29,881 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:29,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:30,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 21:19:30,088 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:19:30,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash -36003314, now seen corresponding path program 1 times [2022-11-20 21:19:30,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:30,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607352025] [2022-11-20 21:19:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:30,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:30,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:30,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607352025] [2022-11-20 21:19:30,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607352025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:30,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460035185] [2022-11-20 21:19:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:30,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:30,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:30,799 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:30,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 21:19:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 21:19:30,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:31,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 21:19:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:31,817 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 24 treesize of output 26 [2022-11-20 21:19:32,062 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 28 treesize of output 16 [2022-11-20 21:19:32,068 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 24 treesize of output 12 [2022-11-20 21:19:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:32,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460035185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770599165] [2022-11-20 21:19:32,417 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-20 21:19:32,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:32,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:32,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:32,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:32,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:32,629 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-20 21:19:32,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-20 21:19:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:32,712 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-20 21:19:32,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-20 21:19:33,050 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:19:33,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:33,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:33,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:33,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:33,336 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:19:33,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:19:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:33,393 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-20 21:19:33,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-20 21:19:33,564 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:37,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30796#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-20 21:19:37,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:37,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:19:37,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 30 [2022-11-20 21:19:37,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640277903] [2022-11-20 21:19:37,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:37,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 21:19:37,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 21:19:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2618, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 21:19:37,821 INFO L87 Difference]: Start difference. First operand 321 states and 380 transitions. Second operand has 32 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:19:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:40,101 INFO L93 Difference]: Finished difference Result 444 states and 512 transitions. [2022-11-20 21:19:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 21:19:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-11-20 21:19:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:40,103 INFO L225 Difference]: With dead ends: 444 [2022-11-20 21:19:40,103 INFO L226 Difference]: Without dead ends: 444 [2022-11-20 21:19:40,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=735, Invalid=5907, Unknown=0, NotChecked=0, Total=6642 [2022-11-20 21:19:40,104 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 604 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:40,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 682 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1120 Invalid, 0 Unknown, 88 Unchecked, 0.9s Time] [2022-11-20 21:19:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-20 21:19:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 328. [2022-11-20 21:19:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 299 states have (on average 1.2107023411371238) internal successors, (362), 311 states have internal predecessors, (362), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-20 21:19:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 386 transitions. [2022-11-20 21:19:40,115 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 386 transitions. Word has length 56 [2022-11-20 21:19:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:40,116 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 386 transitions. [2022-11-20 21:19:40,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:19:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 386 transitions. [2022-11-20 21:19:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 21:19:40,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:40,117 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:40,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:40,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 21:19:40,323 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:19:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash -218314186, now seen corresponding path program 1 times [2022-11-20 21:19:40,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:40,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815863049] [2022-11-20 21:19:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:40,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:40,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815863049] [2022-11-20 21:19:40,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815863049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:40,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332595886] [2022-11-20 21:19:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:40,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:40,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:40,945 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:40,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 21:19:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:41,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 21:19:41,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:41,330 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:19:41,330 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 18 [2022-11-20 21:19:41,548 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:19:41,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 21:19:41,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:19:41,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:41,758 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 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 21:19:41,891 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:19:41,891 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-11-20 21:19:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:41,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:42,225 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:19:42,225 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 12 [2022-11-20 21:19:42,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 21:19:42,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332595886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773559498] [2022-11-20 21:19:42,310 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-20 21:19:42,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:42,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:42,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:42,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:42,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:42,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:42,519 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:19:42,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:19:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:42,593 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:19:42,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:19:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:42,747 INFO L321 Elim1Store]: treesize reduction 207, result has 26.1 percent of original size [2022-11-20 21:19:42,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 188 treesize of output 225 [2022-11-20 21:19:42,779 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:19:42,810 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:19:43,145 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:19:43,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:43,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:43,520 INFO L321 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-11-20 21:19:43,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 246 [2022-11-20 21:19:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:43,611 INFO L321 Elim1Store]: treesize reduction 179, result has 30.6 percent of original size [2022-11-20 21:19:43,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 266 [2022-11-20 21:19:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:43,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:44,008 INFO L321 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2022-11-20 21:19:44,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 547 treesize of output 551 [2022-11-20 21:19:44,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:52,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31881#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_~input#1.base| 5) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:52,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:52,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:19:52,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2022-11-20 21:19:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271064371] [2022-11-20 21:19:52,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:52,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 21:19:52,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 21:19:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2663, Unknown=4, NotChecked=0, Total=2970 [2022-11-20 21:19:52,797 INFO L87 Difference]: Start difference. First operand 328 states and 386 transitions. Second operand has 30 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:19:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:54,326 INFO L93 Difference]: Finished difference Result 356 states and 411 transitions. [2022-11-20 21:19:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 21:19:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-11-20 21:19:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:54,328 INFO L225 Difference]: With dead ends: 356 [2022-11-20 21:19:54,328 INFO L226 Difference]: Without dead ends: 356 [2022-11-20 21:19:54,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=755, Invalid=5403, Unknown=4, NotChecked=0, Total=6162 [2022-11-20 21:19:54,329 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 366 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:54,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 530 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 372 Invalid, 0 Unknown, 295 Unchecked, 0.3s Time] [2022-11-20 21:19:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-20 21:19:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 330. [2022-11-20 21:19:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 304 states have (on average 1.194078947368421) internal successors, (363), 313 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-20 21:19:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 385 transitions. [2022-11-20 21:19:54,336 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 385 transitions. Word has length 56 [2022-11-20 21:19:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:54,336 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 385 transitions. [2022-11-20 21:19:54,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:19:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 385 transitions. [2022-11-20 21:19:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 21:19:54,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:54,338 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:54,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:54,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 21:19:54,544 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:19:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1822194776, now seen corresponding path program 1 times [2022-11-20 21:19:54,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:54,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143372058] [2022-11-20 21:19:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:54,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:55,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143372058] [2022-11-20 21:19:55,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143372058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289973242] [2022-11-20 21:19:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:55,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:55,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:55,221 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:55,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 21:19:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 21:19:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:55,647 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:19:55,647 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 17 treesize of output 21 [2022-11-20 21:19:55,968 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 21:19:55,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 21:19:56,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:19:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:56,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289973242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:56,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [661553338] [2022-11-20 21:19:56,311 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-20 21:19:56,311 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:56,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:56,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:56,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:56,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:56,484 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:19:56,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:19:56,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:56,558 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:19:56,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:19:56,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:56,710 INFO L321 Elim1Store]: treesize reduction 207, result has 26.1 percent of original size [2022-11-20 21:19:56,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 188 treesize of output 225 [2022-11-20 21:19:56,750 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:19:56,778 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:19:57,055 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:19:57,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:57,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:57,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:57,432 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-20 21:19:57,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 219 treesize of output 218 [2022-11-20 21:19:57,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:57,519 INFO L321 Elim1Store]: treesize reduction 166, result has 23.9 percent of original size [2022-11-20 21:19:57,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 219 treesize of output 242 [2022-11-20 21:19:57,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:57,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:19:57,777 INFO L321 Elim1Store]: treesize reduction 199, result has 26.8 percent of original size [2022-11-20 21:19:57,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 224 treesize of output 261 [2022-11-20 21:19:57,826 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:19:57,875 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:19:57,920 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:19:57,983 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:20:05,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32881#(and (or (and (= 6 |~#commands~0.base|) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) |~#commands~0.offset|)) 1) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) |~#commands~0.offset|)) (= |old(~global~0.offset)| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) |~#commands~0.offset|) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) |~#commands~0.offset|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0))' at error location [2022-11-20 21:20:05,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:20:05,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:20:05,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2022-11-20 21:20:05,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738475524] [2022-11-20 21:20:05,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:05,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 21:20:05,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 21:20:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2207, Unknown=6, NotChecked=0, Total=2450 [2022-11-20 21:20:05,113 INFO L87 Difference]: Start difference. First operand 330 states and 385 transitions. Second operand has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:20:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:07,177 INFO L93 Difference]: Finished difference Result 385 states and 437 transitions. [2022-11-20 21:20:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 21:20:07,178 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-11-20 21:20:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:07,179 INFO L225 Difference]: With dead ends: 385 [2022-11-20 21:20:07,180 INFO L226 Difference]: Without dead ends: 385 [2022-11-20 21:20:07,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=665, Invalid=4731, Unknown=6, NotChecked=0, Total=5402 [2022-11-20 21:20:07,181 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 607 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:07,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 401 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 427 Invalid, 0 Unknown, 115 Unchecked, 0.3s Time] [2022-11-20 21:20:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-20 21:20:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 250. [2022-11-20 21:20:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 231 states have (on average 1.1861471861471862) internal successors, (274), 237 states have internal predecessors, (274), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-20 21:20:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 289 transitions. [2022-11-20 21:20:07,187 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 289 transitions. Word has length 57 [2022-11-20 21:20:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:07,187 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 289 transitions. [2022-11-20 21:20:07,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:20:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 289 transitions. [2022-11-20 21:20:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 21:20:07,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:07,189 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:07,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:07,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 21:20:07,394 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash 631491711, now seen corresponding path program 1 times [2022-11-20 21:20:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:07,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205797487] [2022-11-20 21:20:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:07,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205797487] [2022-11-20 21:20:07,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205797487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149460778] [2022-11-20 21:20:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:07,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:07,453 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:07,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 21:20:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:20:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:07,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:07,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149460778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:07,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683061987] [2022-11-20 21:20:07,650 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-20 21:20:07,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:20:07,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:20:07,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:20:07,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:20:07,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:07,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:07,868 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:20:07,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:20:07,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:07,933 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:20:07,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:20:08,216 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:20:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:08,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:08,418 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:20:08,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:20:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:08,478 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-20 21:20:08,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-20 21:20:08,624 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:20:11,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33939#(and (<= |parse_input_~input#1.offset| 0) (= |parse_input_c1_~x~0#1.offset| 0) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (not (= ~global~0.offset 0)) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:20:11,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:20:11,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:20:11,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-20 21:20:11,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735350505] [2022-11-20 21:20:11,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:11,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:20:11,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:20:11,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:20:11,061 INFO L87 Difference]: Start difference. First operand 250 states and 289 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:20:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:11,096 INFO L93 Difference]: Finished difference Result 258 states and 296 transitions. [2022-11-20 21:20:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:20:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-11-20 21:20:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:11,098 INFO L225 Difference]: With dead ends: 258 [2022-11-20 21:20:11,098 INFO L226 Difference]: Without dead ends: 258 [2022-11-20 21:20:11,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:20:11,099 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:11,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 57 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:20:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-20 21:20:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 249. [2022-11-20 21:20:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 231 states have (on average 1.1774891774891776) internal successors, (272), 236 states have internal predecessors, (272), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-20 21:20:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2022-11-20 21:20:11,104 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 58 [2022-11-20 21:20:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:11,104 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2022-11-20 21:20:11,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:20:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2022-11-20 21:20:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 21:20:11,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:11,105 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:11,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:11,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:11,312 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash 653463253, now seen corresponding path program 1 times [2022-11-20 21:20:11,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:11,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169286181] [2022-11-20 21:20:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:11,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:11,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169286181] [2022-11-20 21:20:11,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169286181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407954588] [2022-11-20 21:20:11,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:11,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:11,961 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:11,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 21:20:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:12,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 21:20:12,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:12,763 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:20:12,763 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 18 [2022-11-20 21:20:12,796 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:20:12,796 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 17 treesize of output 21 [2022-11-20 21:20:13,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:20:13,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:13,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:20:13,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 21:20:13,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:20:13,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 21:20:14,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 21:20:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:14,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:14,423 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 14 [2022-11-20 21:20:14,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407954588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:14,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598874927] [2022-11-20 21:20:14,536 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-20 21:20:14,536 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:20:14,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:20:14,537 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:20:14,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:20:14,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:14,748 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-20 21:20:14,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-20 21:20:14,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:14,839 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-20 21:20:14,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-20 21:20:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:15,028 INFO L321 Elim1Store]: treesize reduction 207, result has 26.1 percent of original size [2022-11-20 21:20:15,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 188 treesize of output 225 [2022-11-20 21:20:15,064 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:20:15,097 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 21:20:15,418 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:20:15,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:15,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:15,813 INFO L321 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-11-20 21:20:15,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 246 [2022-11-20 21:20:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:15,902 INFO L321 Elim1Store]: treesize reduction 179, result has 30.6 percent of original size [2022-11-20 21:20:15,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 266 [2022-11-20 21:20:16,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:16,277 INFO L321 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2022-11-20 21:20:16,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 547 treesize of output 551 [2022-11-20 21:20:17,242 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:20:25,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34721#(and (<= 0 ~global~0.offset) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= ~global~0.offset 0) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (<= 3 |parse_input_#in~input#1.base|) (or (and (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|)))) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|))) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|))) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= 6 |~#commands~0.base|) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5))' at error location [2022-11-20 21:20:25,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:20:25,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:20:25,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2022-11-20 21:20:25,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046192215] [2022-11-20 21:20:25,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:25,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 21:20:25,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:25,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 21:20:25,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3025, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 21:20:25,628 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 32 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:20:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:28,266 INFO L93 Difference]: Finished difference Result 517 states and 594 transitions. [2022-11-20 21:20:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 21:20:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2022-11-20 21:20:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:28,269 INFO L225 Difference]: With dead ends: 517 [2022-11-20 21:20:28,269 INFO L226 Difference]: Without dead ends: 517 [2022-11-20 21:20:28,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=709, Invalid=6773, Unknown=0, NotChecked=0, Total=7482 [2022-11-20 21:20:28,270 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 352 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:28,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 556 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 599 Invalid, 0 Unknown, 432 Unchecked, 0.5s Time] [2022-11-20 21:20:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-20 21:20:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 251. [2022-11-20 21:20:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 233 states have (on average 1.1759656652360515) internal successors, (274), 238 states have internal predecessors, (274), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-20 21:20:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 289 transitions. [2022-11-20 21:20:28,277 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 289 transitions. Word has length 58 [2022-11-20 21:20:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:28,278 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 289 transitions. [2022-11-20 21:20:28,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:20:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 289 transitions. [2022-11-20 21:20:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 21:20:28,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:28,279 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:28,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:28,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-20 21:20:28,485 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:28,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1273148673, now seen corresponding path program 1 times [2022-11-20 21:20:28,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:28,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607630927] [2022-11-20 21:20:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:28,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:28,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:28,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607630927] [2022-11-20 21:20:28,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607630927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:28,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448264004] [2022-11-20 21:20:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:28,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:28,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:28,586 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:28,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 21:20:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:28,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:20:28,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:28,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:20:28,737 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:20:28,737 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 17 treesize of output 21 [2022-11-20 21:20:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:28,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:28,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448264004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1471595486] [2022-11-20 21:20:28,911 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-20 21:20:28,911 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:20:28,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:20:28,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:20:28,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:20:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:29,153 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-20 21:20:29,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-20 21:20:29,254 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-20 21:20:29,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-20 21:20:29,618 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-20 21:20:29,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:29,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:29,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:29,898 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:20:29,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-20 21:20:29,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:29,962 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-20 21:20:29,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-20 21:20:30,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:20:34,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35938#(and (<= |parse_input_~input#1.offset| 0) (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (<= 0 |#NULL.base|) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (<= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (<= |parse_input_~input#1.base| 5) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-20 21:20:34,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:20:34,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:20:34,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2022-11-20 21:20:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559481428] [2022-11-20 21:20:34,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:34,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:20:34,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:20:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:20:34,318 INFO L87 Difference]: Start difference. First operand 251 states and 289 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 21:20:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:34,382 INFO L93 Difference]: Finished difference Result 301 states and 345 transitions. [2022-11-20 21:20:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:20:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-11-20 21:20:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:34,384 INFO L225 Difference]: With dead ends: 301 [2022-11-20 21:20:34,384 INFO L226 Difference]: Without dead ends: 301 [2022-11-20 21:20:34,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 151 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2022-11-20 21:20:34,385 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:34,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 159 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-11-20 21:20:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-20 21:20:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2022-11-20 21:20:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 272 states have (on average 1.1727941176470589) internal successors, (319), 278 states have internal predecessors, (319), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-20 21:20:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 338 transitions. [2022-11-20 21:20:34,390 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 338 transitions. Word has length 60 [2022-11-20 21:20:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:34,391 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 338 transitions. [2022-11-20 21:20:34,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 21:20:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 338 transitions. [2022-11-20 21:20:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 21:20:34,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:34,392 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:34,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-20 21:20:34,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-20 21:20:34,598 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:34,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:34,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1044151464, now seen corresponding path program 1 times [2022-11-20 21:20:34,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:34,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887842894] [2022-11-20 21:20:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:34,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:35,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:35,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887842894] [2022-11-20 21:20:35,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887842894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:35,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112504736] [2022-11-20 21:20:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:35,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:35,224 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:35,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 21:20:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:35,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:20:35,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:35,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 21:20:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:20:35,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:20:35,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112504736] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:35,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:20:35,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15, 5] total 26 [2022-11-20 21:20:35,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864803918] [2022-11-20 21:20:35,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:35,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:20:35,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:35,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:20:35,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:20:35,846 INFO L87 Difference]: Start difference. First operand 293 states and 338 transitions. Second operand has 7 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:20:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:35,949 INFO L93 Difference]: Finished difference Result 327 states and 368 transitions. [2022-11-20 21:20:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:20:35,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2022-11-20 21:20:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:35,951 INFO L225 Difference]: With dead ends: 327 [2022-11-20 21:20:35,952 INFO L226 Difference]: Without dead ends: 327 [2022-11-20 21:20:35,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-11-20 21:20:35,952 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 164 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:35,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 74 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:20:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-20 21:20:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 287. [2022-11-20 21:20:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 267 states have (on average 1.146067415730337) internal successors, (306), 272 states have internal predecessors, (306), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-20 21:20:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 325 transitions. [2022-11-20 21:20:35,958 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 325 transitions. Word has length 60 [2022-11-20 21:20:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:35,958 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 325 transitions. [2022-11-20 21:20:35,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:20:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 325 transitions. [2022-11-20 21:20:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 21:20:35,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:35,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:35,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:36,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:36,166 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:36,166 INFO L85 PathProgramCache]: Analyzing trace with hash 635004488, now seen corresponding path program 1 times [2022-11-20 21:20:36,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:36,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248800816] [2022-11-20 21:20:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:36,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:36,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248800816] [2022-11-20 21:20:36,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248800816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599017472] [2022-11-20 21:20:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:36,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:36,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:36,383 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:36,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 21:20:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 21:20:36,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:36,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:20:36,688 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 21:20:36,688 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 3 case distinctions, treesize of input 20 treesize of output 21 [2022-11-20 21:20:36,719 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 21:20:36,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:20:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:36,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:36,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599017472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:36,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363036341] [2022-11-20 21:20:36,827 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-20 21:20:36,827 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:20:36,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:20:36,827 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:20:36,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:20:36,953 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-20 21:20:36,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-20 21:20:37,159 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-20 21:20:37,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:20:37,303 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-20 21:20:37,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:20:37,320 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-20 21:20:37,400 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-20 21:20:37,706 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-20 21:20:37,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:37,800 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-20 21:20:37,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-20 21:20:37,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:37,822 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-20 21:20:37,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-20 21:20:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:20:37,945 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-20 21:20:37,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-20 21:20:38,020 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:20:41,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37810#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |parse_input_#in~input#1.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:20:41,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:20:41,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:20:41,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-20 21:20:41,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841069224] [2022-11-20 21:20:41,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:41,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:20:41,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:41,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:20:41,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-11-20 21:20:41,165 INFO L87 Difference]: Start difference. First operand 287 states and 325 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 21:20:41,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:41,376 INFO L93 Difference]: Finished difference Result 341 states and 383 transitions. [2022-11-20 21:20:41,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:20:41,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-11-20 21:20:41,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:41,378 INFO L225 Difference]: With dead ends: 341 [2022-11-20 21:20:41,378 INFO L226 Difference]: Without dead ends: 341 [2022-11-20 21:20:41,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 21:20:41,379 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 72 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:41,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 148 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 21:20:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-20 21:20:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 290. [2022-11-20 21:20:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 269 states have (on average 1.141263940520446) internal successors, (307), 275 states have internal predecessors, (307), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-20 21:20:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 327 transitions. [2022-11-20 21:20:41,396 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 327 transitions. Word has length 62 [2022-11-20 21:20:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:41,397 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 327 transitions. [2022-11-20 21:20:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 21:20:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 327 transitions. [2022-11-20 21:20:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 21:20:41,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:41,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2022-11-20 21:20:41,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-20 21:20:41,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:41,604 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash 476729907, now seen corresponding path program 1 times [2022-11-20 21:20:41,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:41,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382256908] [2022-11-20 21:20:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:41,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:41,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:41,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382256908] [2022-11-20 21:20:41,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382256908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:41,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793573602] [2022-11-20 21:20:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:41,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:41,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:41,700 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:41,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 21:20:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:20:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:41,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:20:42,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793573602] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:42,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:20:42,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 9 [2022-11-20 21:20:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528066810] [2022-11-20 21:20:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:20:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:20:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:20:42,080 INFO L87 Difference]: Start difference. First operand 290 states and 327 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:20:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:42,157 INFO L93 Difference]: Finished difference Result 266 states and 294 transitions. [2022-11-20 21:20:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:20:42,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-11-20 21:20:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:42,158 INFO L225 Difference]: With dead ends: 266 [2022-11-20 21:20:42,158 INFO L226 Difference]: Without dead ends: 250 [2022-11-20 21:20:42,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:20:42,159 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 53 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:42,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:20:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-20 21:20:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 196. [2022-11-20 21:20:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 183 states have (on average 1.1366120218579234) internal successors, (208), 185 states have internal predecessors, (208), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 21:20:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2022-11-20 21:20:42,163 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 63 [2022-11-20 21:20:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:42,163 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2022-11-20 21:20:42,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:20:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2022-11-20 21:20:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 21:20:42,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:42,164 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:42,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:42,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-20 21:20:42,379 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1831591415, now seen corresponding path program 1 times [2022-11-20 21:20:42,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:42,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469206352] [2022-11-20 21:20:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:42,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 21:20:42,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 21:20:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 21:20:42,445 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 21:20:42,445 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 21:20:42,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-20 21:20:42,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-20 21:20:42,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-20 21:20:42,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-20 21:20:42,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-20 21:20:42,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-20 21:20:42,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-20 21:20:42,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-20 21:20:42,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-20 21:20:42,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-20 21:20:42,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-20 21:20:42,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-11-20 21:20:42,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-11-20 21:20:42,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-11-20 21:20:42,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-11-20 21:20:42,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-11-20 21:20:42,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-11-20 21:20:42,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-20 21:20:42,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-20 21:20:42,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-20 21:20:42,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-11-20 21:20:42,455 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:42,459 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 21:20:42,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:20:42 BoogieIcfgContainer [2022-11-20 21:20:42,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 21:20:42,518 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 21:20:42,518 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 21:20:42,518 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 21:20:42,519 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:15:47" (3/4) ... [2022-11-20 21:20:42,522 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 21:20:42,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 21:20:42,523 INFO L158 Benchmark]: Toolchain (without parser) took 296305.66ms. Allocated memory was 176.2MB in the beginning and 371.2MB in the end (delta: 195.0MB). Free memory was 131.1MB in the beginning and 216.9MB in the end (delta: -85.8MB). Peak memory consumption was 111.7MB. Max. memory is 16.1GB. [2022-11-20 21:20:42,523 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 125.8MB. Free memory was 89.3MB in the beginning and 89.2MB in the end (delta: 30.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:20:42,523 INFO L158 Benchmark]: CACSL2BoogieTranslator took 611.57ms. Allocated memory is still 176.2MB. Free memory was 131.1MB in the beginning and 111.6MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-20 21:20:42,523 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.34ms. Allocated memory is still 176.2MB. Free memory was 111.6MB in the beginning and 109.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:20:42,524 INFO L158 Benchmark]: Boogie Preprocessor took 40.41ms. Allocated memory is still 176.2MB. Free memory was 109.5MB in the beginning and 108.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:20:42,524 INFO L158 Benchmark]: RCFGBuilder took 599.85ms. Allocated memory is still 176.2MB. Free memory was 108.0MB in the beginning and 90.6MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-20 21:20:42,524 INFO L158 Benchmark]: TraceAbstraction took 294975.32ms. Allocated memory was 176.2MB in the beginning and 371.2MB in the end (delta: 195.0MB). Free memory was 89.9MB in the beginning and 216.9MB in the end (delta: -127.0MB). Peak memory consumption was 69.8MB. Max. memory is 16.1GB. [2022-11-20 21:20:42,524 INFO L158 Benchmark]: Witness Printer took 4.51ms. Allocated memory is still 371.2MB. Free memory is still 216.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:20:42,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 125.8MB. Free memory was 89.3MB in the beginning and 89.2MB in the end (delta: 30.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 611.57ms. Allocated memory is still 176.2MB. Free memory was 131.1MB in the beginning and 111.6MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.34ms. Allocated memory is still 176.2MB. Free memory was 111.6MB in the beginning and 109.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.41ms. Allocated memory is still 176.2MB. Free memory was 109.5MB in the beginning and 108.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 599.85ms. Allocated memory is still 176.2MB. Free memory was 108.0MB in the beginning and 90.6MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 294975.32ms. Allocated memory was 176.2MB in the beginning and 371.2MB in the end (delta: 195.0MB). Free memory was 89.9MB in the beginning and 216.9MB in the end (delta: -127.0MB). Peak memory consumption was 69.8MB. Max. memory is 16.1GB. * Witness Printer took 4.51ms. Allocated memory is still 371.2MB. Free memory is still 216.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; [L722] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-3:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 58 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 294.8s, OverallIterations: 47, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 31.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11901 SdHoareTripleChecker+Valid, 10.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11900 mSDsluCounter, 11783 SdHoareTripleChecker+Invalid, 9.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2703 IncrementalHoareTripleChecker+Unchecked, 9619 mSDsCounter, 1355 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10813 IncrementalHoareTripleChecker+Invalid, 14871 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1355 mSolverCounterUnsat, 2164 mSDtfsCounter, 10813 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4827 GetRequests, 3082 SyntacticMatches, 166 SemanticMatches, 1579 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 29214 ImplicationChecksByTransitivity, 202.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=477occurred in iteration=22, InterpolantAutomatonStates: 641, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 46 MinimizatonAttempts, 2491 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 41.7s InterpolantComputationTime, 3478 NumberOfCodeBlocks, 3470 NumberOfCodeBlocksAsserted, 94 NumberOfCheckSat, 4015 ConstructedInterpolants, 295 QuantifiedInterpolants, 44605 SizeOfPredicates, 181 NumberOfNonLiveVariables, 10388 ConjunctsInSsa, 782 ConjunctsInUnsatCore, 99 InterpolantComputations, 14 PerfectInterpolantSequences, 1484/2899 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 4.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 58, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 141, TOOLS_POST_TIME: 3.2s, TOOLS_POST_CALL_APPLICATIONS: 9, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 154, TOOLS_QUANTIFIERELIM_TIME: 3.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 236, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 58, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 1.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.5s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.5s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 692, DAG_COMPRESSION_RETAINED_NODES: 172, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-20 21:20:42,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- 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-6b4ec56 [2022-11-20 21:20:44,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:20:44,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:20:45,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:20:45,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:20:45,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:20:45,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:20:45,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:20:45,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:20:45,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:20:45,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:20:45,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:20:45,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:20:45,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:20:45,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:20:45,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:20:45,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:20:45,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:20:45,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:20:45,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:20:45,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:20:45,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:20:45,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:20:45,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:20:45,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:20:45,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:20:45,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:20:45,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:20:45,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:20:45,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:20:45,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:20:45,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:20:45,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:20:45,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:20:45,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:20:45,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:20:45,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:20:45,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:20:45,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:20:45,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:20:45,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:20:45,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 21:20:45,153 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:20:45,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:20:45,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:20:45,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:20:45,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:20:45,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:20:45,155 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:20:45,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:20:45,156 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:20:45,156 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:20:45,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:20:45,157 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:20:45,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:20:45,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:20:45,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:20:45,159 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:20:45,159 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:20:45,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:20:45,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:20:45,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:20:45,160 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:20:45,160 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:20:45,160 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:20:45,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:20:45,161 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:20:45,161 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 21:20:45,161 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 21:20:45,161 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:20:45,162 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:20:45,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:20:45,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 21:20:45,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:20:45,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:20:45,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:20:45,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:20:45,163 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 21:20:45,163 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 21:20:45,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:20:45,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 21:20:45,164 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_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-11-20 21:20:45,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:20:45,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:20:45,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:20:45,563 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:20:45,564 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:20:45,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-20 21:20:48,648 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:20:48,893 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:20:48,893 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-20 21:20:48,907 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/data/6deba6c05/cf34fe5dca0f4b878c4dcb5be3654d89/FLAG2e4e5566c [2022-11-20 21:20:48,926 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/data/6deba6c05/cf34fe5dca0f4b878c4dcb5be3654d89 [2022-11-20 21:20:48,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:20:48,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:20:48,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:20:48,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:20:48,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:20:48,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:20:48" (1/1) ... [2022-11-20 21:20:48,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76bca77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:48, skipping insertion in model container [2022-11-20 21:20:48,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:20:48" (1/1) ... [2022-11-20 21:20:48,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:20:48,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:20:49,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:20:49,367 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:20:49,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:20:49,486 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:20:49,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49 WrapperNode [2022-11-20 21:20:49,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:20:49,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:20:49,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:20:49,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:20:49,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,539 INFO L138 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-11-20 21:20:49,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:20:49,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:20:49,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:20:49,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:20:49,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,570 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:20:49,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:20:49,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:20:49,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:20:49,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (1/1) ... [2022-11-20 21:20:49,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:20:49,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:49,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:20:49,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:20:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-20 21:20:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-20 21:20:49,682 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-20 21:20:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:20:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:20:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 21:20:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:20:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 21:20:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 21:20:49,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:20:49,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:20:49,815 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:20:49,818 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:20:50,285 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:20:50,291 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:20:50,291 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 21:20:50,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:20:50 BoogieIcfgContainer [2022-11-20 21:20:50,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:20:50,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:20:50,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:20:50,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:20:50,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:20:48" (1/3) ... [2022-11-20 21:20:50,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1fae30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:20:50, skipping insertion in model container [2022-11-20 21:20:50,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:20:49" (2/3) ... [2022-11-20 21:20:50,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1fae30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:20:50, skipping insertion in model container [2022-11-20 21:20:50,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:20:50" (3/3) ... [2022-11-20 21:20:50,344 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-11-20 21:20:50,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:20:50,364 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-20 21:20:50,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:20:50,436 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;@27b25707, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:20:50,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-20 21:20:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 21:20:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:20:50,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:50,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:20:50,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-11-20 21:20:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:20:50,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836353190] [2022-11-20 21:20:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:50,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:50,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:20:50,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:20:50,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 21:20:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:50,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:20:50,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:50,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:20:50,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:20:50,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836353190] [2022-11-20 21:20:50,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836353190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:50,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:50,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:20:50,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473227258] [2022-11-20 21:20:50,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:50,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:20:50,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:20:50,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:20:50,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:50,891 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:51,119 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-11-20 21:20:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:20:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2022-11-20 21:20:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:51,135 INFO L225 Difference]: With dead ends: 110 [2022-11-20 21:20:51,139 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 21:20:51,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:20:51,147 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:51,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:20:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 21:20:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-11-20 21:20:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 21:20:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-11-20 21:20:51,234 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2022-11-20 21:20:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:51,234 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-11-20 21:20:51,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-11-20 21:20:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:20:51,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:51,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:20:51,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:51,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:51,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-11-20 21:20:51,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:20:51,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224856795] [2022-11-20 21:20:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:51,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:51,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:20:51,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:20:51,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 21:20:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 21:20:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:51,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:20:51,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:20:51,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224856795] [2022-11-20 21:20:51,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224856795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:51,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:51,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:20:51,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95403436] [2022-11-20 21:20:51,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:51,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:20:51,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:20:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:20:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:20:51,671 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:51,891 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2022-11-20 21:20:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:20:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-11-20 21:20:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:51,894 INFO L225 Difference]: With dead ends: 206 [2022-11-20 21:20:51,894 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 21:20:51,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:20:51,895 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 126 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:51,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 142 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:20:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 21:20:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-11-20 21:20:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 21:20:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2022-11-20 21:20:51,916 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2022-11-20 21:20:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:51,916 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2022-11-20 21:20:51,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2022-11-20 21:20:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:20:51,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:51,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:51,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:52,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-11-20 21:20:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:20:52,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245959204] [2022-11-20 21:20:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:52,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:20:52,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:20:52,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 21:20:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:52,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:20:52,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:52,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:20:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:52,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:20:52,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:20:52,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245959204] [2022-11-20 21:20:52,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245959204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:52,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:52,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:20:52,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361464949] [2022-11-20 21:20:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:52,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:20:52,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:20:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:20:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:20:52,442 INFO L87 Difference]: Start difference. First operand 152 states and 238 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:52,790 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-11-20 21:20:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:20:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-11-20 21:20:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:52,793 INFO L225 Difference]: With dead ends: 228 [2022-11-20 21:20:52,793 INFO L226 Difference]: Without dead ends: 228 [2022-11-20 21:20:52,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:20:52,794 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 137 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:52,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 164 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:20:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-20 21:20:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2022-11-20 21:20:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 21:20:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2022-11-20 21:20:52,828 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2022-11-20 21:20:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:52,830 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2022-11-20 21:20:52,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2022-11-20 21:20:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:20:52,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:52,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:52,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:53,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:53,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:53,033 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-11-20 21:20:53,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:20:53,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146196848] [2022-11-20 21:20:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:53,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:53,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:20:53,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:20:53,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 21:20:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:53,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:20:53,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:53,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:20:53,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:20:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:53,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:20:53,319 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:20:53,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146196848] [2022-11-20 21:20:53,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146196848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:53,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:53,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:20:53,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278462591] [2022-11-20 21:20:53,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:20:53,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:20:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:20:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:20:53,323 INFO L87 Difference]: Start difference. First operand 155 states and 241 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:53,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:53,605 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2022-11-20 21:20:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:20:53,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2022-11-20 21:20:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:53,607 INFO L225 Difference]: With dead ends: 208 [2022-11-20 21:20:53,607 INFO L226 Difference]: Without dead ends: 208 [2022-11-20 21:20:53,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:20:53,608 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 129 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:53,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 190 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:20:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-20 21:20:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-11-20 21:20:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 21:20:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2022-11-20 21:20:53,643 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2022-11-20 21:20:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:53,643 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2022-11-20 21:20:53,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2022-11-20 21:20:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:20:53,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:53,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:53,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:53,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:53,848 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:53,849 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-11-20 21:20:53,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:20:53,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845909763] [2022-11-20 21:20:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:53,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:53,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:20:53,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:20:53,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 21:20:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:20:53,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:54,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:20:54,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:20:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845909763] [2022-11-20 21:20:54,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845909763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:54,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:54,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:20:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335348194] [2022-11-20 21:20:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:54,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:20:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:20:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:20:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:20:54,026 INFO L87 Difference]: Start difference. First operand 155 states and 239 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:54,215 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-11-20 21:20:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:20:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-20 21:20:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:54,218 INFO L225 Difference]: With dead ends: 234 [2022-11-20 21:20:54,218 INFO L226 Difference]: Without dead ends: 234 [2022-11-20 21:20:54,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:20:54,219 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:54,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:20:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-20 21:20:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2022-11-20 21:20:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 21:20:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2022-11-20 21:20:54,246 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2022-11-20 21:20:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:54,246 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2022-11-20 21:20:54,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2022-11-20 21:20:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:20:54,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:54,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:54,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:54,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:54,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:54,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:54,471 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-11-20 21:20:54,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:20:54,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993626891] [2022-11-20 21:20:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:54,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:54,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:20:54,475 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:20:54,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 21:20:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:54,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:20:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:54,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:20:54,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:20:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993626891] [2022-11-20 21:20:54,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993626891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:20:54,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:20:54,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:20:54,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815856140] [2022-11-20 21:20:54,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:20:54,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:20:54,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:20:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:20:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:20:54,641 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:54,841 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2022-11-20 21:20:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:20:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2022-11-20 21:20:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:54,843 INFO L225 Difference]: With dead ends: 231 [2022-11-20 21:20:54,843 INFO L226 Difference]: Without dead ends: 231 [2022-11-20 21:20:54,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:20:54,844 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:54,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:20:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-20 21:20:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2022-11-20 21:20:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 21:20:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2022-11-20 21:20:54,866 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2022-11-20 21:20:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:54,867 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2022-11-20 21:20:54,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2022-11-20 21:20:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:20:54,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:54,868 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:54,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:55,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:55,080 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:55,080 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-11-20 21:20:55,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:20:55,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382668929] [2022-11-20 21:20:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:55,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:55,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:20:55,082 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:20:55,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 21:20:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:20:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:55,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:55,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:20:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382668929] [2022-11-20 21:20:55,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382668929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1709228571] [2022-11-20 21:20:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:55,703 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:20:55,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:20:55,705 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:20:55,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 21:20:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:20:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:55,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:56,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1709228571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357632183] [2022-11-20 21:20:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:56,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:56,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:56,206 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:56,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:20:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:20:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:56,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:56,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357632183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:56,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:20:56,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-20 21:20:56,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887030457] [2022-11-20 21:20:56,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:56,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:20:56,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:20:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:20:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:20:56,618 INFO L87 Difference]: Start difference. First operand 201 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:57,208 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2022-11-20 21:20:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:20:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:20:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:57,211 INFO L225 Difference]: With dead ends: 367 [2022-11-20 21:20:57,211 INFO L226 Difference]: Without dead ends: 367 [2022-11-20 21:20:57,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:20:57,212 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 261 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:57,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 312 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:20:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-20 21:20:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2022-11-20 21:20:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-20 21:20:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2022-11-20 21:20:57,226 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2022-11-20 21:20:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:57,226 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2022-11-20 21:20:57,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2022-11-20 21:20:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:20:57,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:57,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:57,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:20:57,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-20 21:20:57,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:20:57,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:57,840 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:20:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-11-20 21:20:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:20:57,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386419079] [2022-11-20 21:20:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:57,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:20:57,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:20:57,843 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:20:57,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 21:20:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:20:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:58,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:20:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:58,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:58,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:20:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386419079] [2022-11-20 21:20:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386419079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [579617662] [2022-11-20 21:20:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:58,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:20:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:20:58,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:20:58,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-20 21:20:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:58,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:20:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:58,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:20:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:58,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:58,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [579617662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:58,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308726887] [2022-11-20 21:20:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:58,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:58,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:58,930 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:58,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:20:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:20:59,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:59,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:20:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:59,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:20:59,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308726887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:59,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:20:59,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-11-20 21:20:59,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516307973] [2022-11-20 21:20:59,819 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:59,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:20:59,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:20:59,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:20:59,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:20:59,820 INFO L87 Difference]: Start difference. First operand 239 states and 363 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:02,013 INFO L93 Difference]: Finished difference Result 601 states and 793 transitions. [2022-11-20 21:21:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 21:21:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:21:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:02,017 INFO L225 Difference]: With dead ends: 601 [2022-11-20 21:21:02,017 INFO L226 Difference]: Without dead ends: 601 [2022-11-20 21:21:02,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 21:21:02,019 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1349 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:02,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 506 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 21:21:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-20 21:21:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 307. [2022-11-20 21:21:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 267 states have (on average 1.6254681647940075) internal successors, (434), 292 states have internal predecessors, (434), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-20 21:21:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 475 transitions. [2022-11-20 21:21:02,042 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 475 transitions. Word has length 15 [2022-11-20 21:21:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:02,042 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 475 transitions. [2022-11-20 21:21:02,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 475 transitions. [2022-11-20 21:21:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 21:21:02,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:02,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:02,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 21:21:02,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:02,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:21:02,650 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:21:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-11-20 21:21:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:21:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100831825] [2022-11-20 21:21:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:02,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:21:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:21:02,651 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:21:02,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 21:21:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:02,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:21:02,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:03,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:21:03,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:21:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:03,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:03,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:21:03,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100831825] [2022-11-20 21:21:03,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100831825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:03,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1001354484] [2022-11-20 21:21:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:03,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:21:03,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:21:03,250 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:21:03,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-20 21:21:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:21:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:03,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:21:03,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:21:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:03,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:03,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1001354484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:03,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719104486] [2022-11-20 21:21:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:03,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:03,726 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:03,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 21:21:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:03,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:21:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:04,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:21:04,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:21:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:04,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:04,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719104486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:04,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:21:04,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-11-20 21:21:04,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789961912] [2022-11-20 21:21:04,735 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:21:04,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:21:04,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:21:04,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:21:04,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:21:04,736 INFO L87 Difference]: Start difference. First operand 307 states and 475 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:07,456 INFO L93 Difference]: Finished difference Result 830 states and 1133 transitions. [2022-11-20 21:21:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 21:21:07,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 21:21:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:07,460 INFO L225 Difference]: With dead ends: 830 [2022-11-20 21:21:07,460 INFO L226 Difference]: Without dead ends: 830 [2022-11-20 21:21:07,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-11-20 21:21:07,461 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1151 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:07,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 628 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 21:21:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-11-20 21:21:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 422. [2022-11-20 21:21:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 375 states have (on average 1.6426666666666667) internal successors, (616), 403 states have internal predecessors, (616), 11 states have call successors, (11), 7 states have call predecessors, (11), 16 states have return successors, (48), 11 states have call predecessors, (48), 11 states have call successors, (48) [2022-11-20 21:21:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 675 transitions. [2022-11-20 21:21:07,482 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 675 transitions. Word has length 16 [2022-11-20 21:21:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:07,483 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 675 transitions. [2022-11-20 21:21:07,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 675 transitions. [2022-11-20 21:21:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 21:21:07,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:07,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:07,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:07,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:07,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:08,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:21:08,090 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:21:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-11-20 21:21:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:21:08,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829499777] [2022-11-20 21:21:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:08,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:21:08,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:21:08,093 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:21:08,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 21:21:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:08,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 21:21:08,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:08,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:08,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:21:08,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829499777] [2022-11-20 21:21:08,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829499777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:08,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:08,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:21:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582598928] [2022-11-20 21:21:08,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:08,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:08,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:21:08,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:08,244 INFO L87 Difference]: Start difference. First operand 422 states and 675 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:08,276 INFO L93 Difference]: Finished difference Result 420 states and 622 transitions. [2022-11-20 21:21:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2022-11-20 21:21:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:08,278 INFO L225 Difference]: With dead ends: 420 [2022-11-20 21:21:08,278 INFO L226 Difference]: Without dead ends: 420 [2022-11-20 21:21:08,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:08,279 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:08,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:21:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-20 21:21:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 397. [2022-11-20 21:21:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 350 states have (on average 1.5742857142857143) internal successors, (551), 377 states have internal predecessors, (551), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2022-11-20 21:21:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 603 transitions. [2022-11-20 21:21:08,293 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 603 transitions. Word has length 18 [2022-11-20 21:21:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:08,293 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 603 transitions. [2022-11-20 21:21:08,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 603 transitions. [2022-11-20 21:21:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 21:21:08,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:08,294 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 21:21:08,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:08,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:21:08,506 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:21:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:08,507 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-11-20 21:21:08,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:21:08,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46229612] [2022-11-20 21:21:08,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:21:08,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:21:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:21:08,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:21:08,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 21:21:08,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:21:08,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:21:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:21:08,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:08,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:09,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:21:09,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46229612] [2022-11-20 21:21:09,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46229612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:09,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1847639197] [2022-11-20 21:21:09,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:21:09,591 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:21:09,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:21:09,595 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:21:09,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-20 21:21:09,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:21:09,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:21:09,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:21:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:09,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:10,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1847639197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427864362] [2022-11-20 21:21:10,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:21:10,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:10,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:10,009 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:10,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 21:21:10,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:21:10,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:21:10,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:21:10,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:10,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:10,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427864362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:10,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:21:10,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-20 21:21:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740229849] [2022-11-20 21:21:10,190 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:21:10,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 21:21:10,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:21:10,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 21:21:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:21:10,192 INFO L87 Difference]: Start difference. First operand 397 states and 603 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:11,043 INFO L93 Difference]: Finished difference Result 495 states and 681 transitions. [2022-11-20 21:21:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:21:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 21:21:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:11,046 INFO L225 Difference]: With dead ends: 495 [2022-11-20 21:21:11,046 INFO L226 Difference]: Without dead ends: 495 [2022-11-20 21:21:11,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:21:11,047 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 518 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:11,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 484 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:21:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-20 21:21:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 336. [2022-11-20 21:21:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 288 states have (on average 1.5104166666666667) internal successors, (435), 316 states have internal predecessors, (435), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-20 21:21:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 482 transitions. [2022-11-20 21:21:11,063 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 482 transitions. Word has length 22 [2022-11-20 21:21:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:11,063 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 482 transitions. [2022-11-20 21:21:11,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:21:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 482 transitions. [2022-11-20 21:21:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 21:21:11,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:11,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:11,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:11,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:11,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-20 21:21:11,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:21:11,678 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:21:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:11,679 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-11-20 21:21:11,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:21:11,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029164798] [2022-11-20 21:21:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:21:11,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:21:11,681 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:21:11,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:21:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:11,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:21:11,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:11,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:21:11,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:21:11,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029164798] [2022-11-20 21:21:11,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029164798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:21:11,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:21:11,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:21:11,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160306736] [2022-11-20 21:21:11,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:21:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:21:11,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:21:11,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:21:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:11,769 INFO L87 Difference]: Start difference. First operand 336 states and 482 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:21:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:21:11,775 INFO L93 Difference]: Finished difference Result 259 states and 362 transitions. [2022-11-20 21:21:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:21:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-11-20 21:21:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:21:11,777 INFO L225 Difference]: With dead ends: 259 [2022-11-20 21:21:11,777 INFO L226 Difference]: Without dead ends: 259 [2022-11-20 21:21:11,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:21:11,778 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:21:11,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:21:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-20 21:21:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-11-20 21:21:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 219 states have (on average 1.5068493150684932) internal successors, (330), 244 states have internal predecessors, (330), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-20 21:21:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-11-20 21:21:11,787 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 25 [2022-11-20 21:21:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:21:11,787 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-11-20 21:21:11,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:21:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-11-20 21:21:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:21:11,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:21:11,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:21:11,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-20 21:21:11,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:21:12,000 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:21:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:21:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-11-20 21:21:12,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:21:12,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440116759] [2022-11-20 21:21:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:12,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:21:12,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:21:12,002 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:21:12,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 21:21:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:21:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:14,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:21:14,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:21:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:14,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:14,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:21:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440116759] [2022-11-20 21:21:14,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440116759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1372498280] [2022-11-20 21:21:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:21:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:21:14,967 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:21:14,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-20 21:21:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:15,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:21:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:17,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:21:17,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:21:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:17,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:18,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1372498280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:18,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902201934] [2022-11-20 21:21:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:21:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:18,014 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:18,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 21:21:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:21:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:20,362 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:21:20,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:21:20,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:21:20,723 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:21:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:20,923 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:21:20,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:21:23,843 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:21:23,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:21:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:26,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902201934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:26,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-20 21:21:26,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4] total 12 [2022-11-20 21:21:26,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793431676] [2022-11-20 21:21:26,075 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-20 21:21:26,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:21:26,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:21:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:21:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=152, Unknown=8, NotChecked=0, Total=210 [2022-11-20 21:21:26,077 INFO L87 Difference]: Start difference. First operand 259 states and 362 transitions. Second operand has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 21:21:53,439 WARN L233 SmtUtils]: Spent 12.31s on a formula simplification. DAG size of input: 35 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:22:07,895 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:22:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:08,289 INFO L93 Difference]: Finished difference Result 445 states and 566 transitions. [2022-11-20 21:22:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:22:08,290 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-11-20 21:22:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:08,292 INFO L225 Difference]: With dead ends: 445 [2022-11-20 21:22:08,292 INFO L226 Difference]: Without dead ends: 445 [2022-11-20 21:22:08,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 53.1s TimeCoverageRelationStatistics Valid=186, Invalid=498, Unknown=18, NotChecked=0, Total=702 [2022-11-20 21:22:08,293 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 455 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:08,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 367 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 138 Invalid, 0 Unknown, 272 Unchecked, 0.6s Time] [2022-11-20 21:22:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-20 21:22:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 319. [2022-11-20 21:22:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 275 states have (on average 1.48) internal successors, (407), 302 states have internal predecessors, (407), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-20 21:22:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 443 transitions. [2022-11-20 21:22:08,306 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 443 transitions. Word has length 27 [2022-11-20 21:22:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:08,306 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 443 transitions. [2022-11-20 21:22:08,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 21:22:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 443 transitions. [2022-11-20 21:22:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 21:22:08,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:08,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:08,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:08,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:08,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:22:08,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:22:08,914 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:22:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-11-20 21:22:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:22:08,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542965592] [2022-11-20 21:22:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:08,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:22:08,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:22:08,916 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:22:08,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 21:22:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:08,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:22:09,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:09,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:09,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:22:09,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542965592] [2022-11-20 21:22:09,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542965592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:09,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843379773] [2022-11-20 21:22:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:09,473 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:09,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:22:09,475 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:22:09,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-20 21:22:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:09,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:22:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:09,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:10,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843379773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:10,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748683513] [2022-11-20 21:22:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:10,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:10,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:22:10,070 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:22:10,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 21:22:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:10,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:22:10,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:10,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:10,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748683513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:10,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:22:10,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-11-20 21:22:10,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331202197] [2022-11-20 21:22:10,545 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:22:10,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:22:10,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:22:10,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:22:10,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:22:10,546 INFO L87 Difference]: Start difference. First operand 319 states and 443 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:22:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:11,198 INFO L93 Difference]: Finished difference Result 457 states and 579 transitions. [2022-11-20 21:22:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:22:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-20 21:22:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:11,202 INFO L225 Difference]: With dead ends: 457 [2022-11-20 21:22:11,202 INFO L226 Difference]: Without dead ends: 457 [2022-11-20 21:22:11,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:22:11,203 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 391 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:11,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 226 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:22:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-20 21:22:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 392. [2022-11-20 21:22:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 346 states have (on average 1.4190751445086704) internal successors, (491), 373 states have internal predecessors, (491), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-20 21:22:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 525 transitions. [2022-11-20 21:22:11,216 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 525 transitions. Word has length 28 [2022-11-20 21:22:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:11,219 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 525 transitions. [2022-11-20 21:22:11,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:22:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 525 transitions. [2022-11-20 21:22:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 21:22:11,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:11,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:11,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:11,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:11,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:22:11,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:22:11,826 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:22:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:11,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2022-11-20 21:22:11,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:22:11,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098863567] [2022-11-20 21:22:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:11,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:22:11,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:22:11,828 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:22:11,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 21:22:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:11,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:22:11,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:12,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:12,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:22:12,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098863567] [2022-11-20 21:22:12,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098863567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:12,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [553552731] [2022-11-20 21:22:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:12,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:12,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:22:12,455 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:22:12,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-20 21:22:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:12,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:22:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:13,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:22:13,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [553552731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:22:13,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:22:13,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 13 [2022-11-20 21:22:13,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920909015] [2022-11-20 21:22:13,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:22:13,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:22:13,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:22:13,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:22:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:22:13,046 INFO L87 Difference]: Start difference. First operand 392 states and 525 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:22:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:13,439 INFO L93 Difference]: Finished difference Result 500 states and 641 transitions. [2022-11-20 21:22:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:22:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 29 [2022-11-20 21:22:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:13,449 INFO L225 Difference]: With dead ends: 500 [2022-11-20 21:22:13,449 INFO L226 Difference]: Without dead ends: 500 [2022-11-20 21:22:13,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:22:13,452 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 127 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:13,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 194 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:22:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-20 21:22:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 413. [2022-11-20 21:22:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 367 states have (on average 1.4032697547683923) internal successors, (515), 394 states have internal predecessors, (515), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-20 21:22:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 549 transitions. [2022-11-20 21:22:13,465 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 549 transitions. Word has length 29 [2022-11-20 21:22:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:13,466 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 549 transitions. [2022-11-20 21:22:13,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:22:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 549 transitions. [2022-11-20 21:22:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 21:22:13,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:13,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:13,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:13,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-20 21:22:13,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:13,880 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:22:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-11-20 21:22:13,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:22:13,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322527754] [2022-11-20 21:22:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:13,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:22:13,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:22:13,882 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:22:13,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 21:22:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:22:13,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:22:16,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:22:16,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:22:16,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:22:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:16,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:19,368 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:22:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322527754] [2022-11-20 21:22:19,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322527754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:22:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030465429] [2022-11-20 21:22:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:19,369 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:19,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:22:19,370 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:22:19,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-20 21:22:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:19,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:22:19,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:24,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:22:24,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:22:24,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:22:24,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:22:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:24,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:26,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1030465429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:22:26,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745884146] [2022-11-20 21:22:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:26,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:26,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:22:26,694 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:22:26,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 21:22:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:26,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:22:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:29,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:22:29,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:22:29,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:22:29,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:22:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:29,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:31,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745884146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:22:31,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:22:31,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-20 21:22:31,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359277347] [2022-11-20 21:22:31,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:22:31,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:22:31,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:22:31,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:22:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2022-11-20 21:22:31,893 INFO L87 Difference]: Start difference. First operand 413 states and 549 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:22:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:39,145 INFO L93 Difference]: Finished difference Result 495 states and 610 transitions. [2022-11-20 21:22:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:22:39,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 29 [2022-11-20 21:22:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:39,148 INFO L225 Difference]: With dead ends: 495 [2022-11-20 21:22:39,148 INFO L226 Difference]: Without dead ends: 495 [2022-11-20 21:22:39,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=113, Invalid=299, Unknown=8, NotChecked=0, Total=420 [2022-11-20 21:22:39,149 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 186 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:39,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 301 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 216 Invalid, 0 Unknown, 61 Unchecked, 0.7s Time] [2022-11-20 21:22:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-20 21:22:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 413. [2022-11-20 21:22:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 367 states have (on average 1.3950953678474114) internal successors, (512), 394 states have internal predecessors, (512), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-20 21:22:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 546 transitions. [2022-11-20 21:22:39,162 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 546 transitions. Word has length 29 [2022-11-20 21:22:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:39,162 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 546 transitions. [2022-11-20 21:22:39,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:22:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 546 transitions. [2022-11-20 21:22:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 21:22:39,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:39,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:39,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:39,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:39,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:39,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:39,783 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:22:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:39,783 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-11-20 21:22:39,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:22:39,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815059154] [2022-11-20 21:22:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:39,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:22:39,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:22:39,785 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:22:39,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-20 21:22:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:39,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:22:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:22:40,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:22:40,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:22:40,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815059154] [2022-11-20 21:22:40,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815059154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:40,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1709728420] [2022-11-20 21:22:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:40,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:40,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:22:40,500 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:22:40,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-20 21:22:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:40,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:22:40,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:22:40,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:22:41,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1709728420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:41,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209006942] [2022-11-20 21:22:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:41,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:41,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:22:41,116 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:22:41,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 21:22:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:41,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:22:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:22:41,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:22:41,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209006942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:41,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:22:41,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-20 21:22:41,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901542043] [2022-11-20 21:22:41,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:22:41,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:22:41,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:22:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:22:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:22:41,669 INFO L87 Difference]: Start difference. First operand 413 states and 546 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:22:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:42,619 INFO L93 Difference]: Finished difference Result 452 states and 565 transitions. [2022-11-20 21:22:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:22:42,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-20 21:22:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:42,622 INFO L225 Difference]: With dead ends: 452 [2022-11-20 21:22:42,622 INFO L226 Difference]: Without dead ends: 452 [2022-11-20 21:22:42,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:22:42,624 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 378 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:42,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 311 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:22:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-20 21:22:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 423. [2022-11-20 21:22:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 376 states have (on average 1.375) internal successors, (517), 404 states have internal predecessors, (517), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-20 21:22:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 551 transitions. [2022-11-20 21:22:42,635 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 551 transitions. Word has length 31 [2022-11-20 21:22:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:42,635 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 551 transitions. [2022-11-20 21:22:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:22:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 551 transitions. [2022-11-20 21:22:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 21:22:42,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:42,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:42,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:42,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-20 21:22:43,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:43,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:43,243 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:22:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-11-20 21:22:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:22:43,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914844495] [2022-11-20 21:22:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:43,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:22:43,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:22:43,245 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:22:43,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 21:22:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:22:43,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:43,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:43,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:22:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914844495] [2022-11-20 21:22:43,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914844495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1146556848] [2022-11-20 21:22:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:43,605 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:22:43,606 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:22:43,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-20 21:22:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:22:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:43,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:43,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1146556848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:43,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237599399] [2022-11-20 21:22:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:22:43,956 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:22:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 21:22:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:22:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:44,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237599399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:22:44,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:22:44,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-20 21:22:44,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943812079] [2022-11-20 21:22:44,290 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:22:44,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:22:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:22:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:22:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:22:44,291 INFO L87 Difference]: Start difference. First operand 423 states and 551 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:22:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:22:44,344 INFO L93 Difference]: Finished difference Result 433 states and 557 transitions. [2022-11-20 21:22:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:22:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 40 [2022-11-20 21:22:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:22:44,346 INFO L225 Difference]: With dead ends: 433 [2022-11-20 21:22:44,347 INFO L226 Difference]: Without dead ends: 433 [2022-11-20 21:22:44,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:22:44,348 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 52 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:22:44,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 113 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:22:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-20 21:22:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 421. [2022-11-20 21:22:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 376 states have (on average 1.3590425531914894) internal successors, (511), 402 states have internal predecessors, (511), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-20 21:22:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 545 transitions. [2022-11-20 21:22:44,361 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 545 transitions. Word has length 40 [2022-11-20 21:22:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:22:44,361 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 545 transitions. [2022-11-20 21:22:44,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:22:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 545 transitions. [2022-11-20 21:22:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 21:22:44,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:22:44,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:22:44,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 21:22:44,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-20 21:22:44,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-20 21:22:44,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:44,970 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:22:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:22:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1556115366, now seen corresponding path program 1 times [2022-11-20 21:22:44,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:22:44,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583533458] [2022-11-20 21:22:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:44,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:22:44,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:22:44,972 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:22:44,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 21:22:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:22:45,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:47,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:22:47,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:22:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:48,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:49,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:22:49,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583533458] [2022-11-20 21:22:49,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583533458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:22:49,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1158092401] [2022-11-20 21:22:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:49,285 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:22:49,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:22:49,287 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:22:49,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-20 21:22:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:22:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:22:52,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:22:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:52,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:53,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1158092401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:22:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037105771] [2022-11-20 21:22:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:22:53,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:22:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:22:53,116 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:22:53,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 21:22:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:22:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:22:53,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:22:55,638 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:22:55,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:22:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:22:56,253 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:22:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:22:56,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:57,166 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:22:57,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:23:00,238 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:23:00,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:23:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:02,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037105771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:02,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-20 21:23:02,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5] total 14 [2022-11-20 21:23:02,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624106121] [2022-11-20 21:23:02,446 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:02,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 21:23:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:23:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 21:23:02,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=203, Unknown=10, NotChecked=0, Total=272 [2022-11-20 21:23:02,448 INFO L87 Difference]: Start difference. First operand 421 states and 545 transitions. Second operand has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 21:23:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:10,418 INFO L93 Difference]: Finished difference Result 518 states and 623 transitions. [2022-11-20 21:23:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:23:10,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-11-20 21:23:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:10,421 INFO L225 Difference]: With dead ends: 518 [2022-11-20 21:23:10,421 INFO L226 Difference]: Without dead ends: 518 [2022-11-20 21:23:10,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=161, Invalid=426, Unknown=13, NotChecked=0, Total=600 [2022-11-20 21:23:10,423 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 264 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:10,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 591 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 364 Invalid, 0 Unknown, 161 Unchecked, 1.4s Time] [2022-11-20 21:23:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-11-20 21:23:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 421. [2022-11-20 21:23:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 376 states have (on average 1.3324468085106382) internal successors, (501), 402 states have internal predecessors, (501), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-20 21:23:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 535 transitions. [2022-11-20 21:23:10,436 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 535 transitions. Word has length 41 [2022-11-20 21:23:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:10,436 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 535 transitions. [2022-11-20 21:23:10,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 21:23:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 535 transitions. [2022-11-20 21:23:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 21:23:10,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:10,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-11-20 21:23:10,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:10,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:10,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:11,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:11,042 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:23:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:11,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-11-20 21:23:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:23:11,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715014802] [2022-11-20 21:23:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:23:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:23:11,044 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:23:11,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 21:23:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 21:23:11,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:11,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:11,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:23:11,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715014802] [2022-11-20 21:23:11,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715014802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:11,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771282175] [2022-11-20 21:23:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:11,749 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:23:11,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:23:11,750 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:23:11,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-20 21:23:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:23:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:12,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:12,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771282175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455379674] [2022-11-20 21:23:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:12,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:12,210 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:12,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 21:23:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:23:12,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:12,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:12,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455379674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:12,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:23:12,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-20 21:23:12,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145595290] [2022-11-20 21:23:12,627 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:12,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:23:12,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:23:12,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:23:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:23:12,628 INFO L87 Difference]: Start difference. First operand 421 states and 535 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:23:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:12,911 INFO L93 Difference]: Finished difference Result 380 states and 464 transitions. [2022-11-20 21:23:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:23:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-20 21:23:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:12,914 INFO L225 Difference]: With dead ends: 380 [2022-11-20 21:23:12,914 INFO L226 Difference]: Without dead ends: 380 [2022-11-20 21:23:12,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:23:12,915 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 128 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:12,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 166 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:23:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-20 21:23:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 354. [2022-11-20 21:23:12,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 316 states have (on average 1.3132911392405062) internal successors, (415), 337 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-20 21:23:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 441 transitions. [2022-11-20 21:23:12,926 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 441 transitions. Word has length 41 [2022-11-20 21:23:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:12,926 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 441 transitions. [2022-11-20 21:23:12,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 21:23:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 441 transitions. [2022-11-20 21:23:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 21:23:12,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:12,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-11-20 21:23:12,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:13,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:13,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-20 21:23:13,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:13,530 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:23:13,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:13,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-11-20 21:23:13,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:23:13,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553989985] [2022-11-20 21:23:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:13,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:23:13,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:23:13,533 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:23:13,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 21:23:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:23:13,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:13,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:23:13,800 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:23:13,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:23:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:13,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:14,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:23:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553989985] [2022-11-20 21:23:14,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553989985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [215947365] [2022-11-20 21:23:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:14,060 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:23:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:23:14,061 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:23:14,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-20 21:23:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:23:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:14,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:23:14,467 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:23:14,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:23:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:14,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:14,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [215947365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:14,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126918506] [2022-11-20 21:23:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:14,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:14,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:14,697 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:14,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 21:23:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:23:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:14,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:23:14,952 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:23:14,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 21:23:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:14,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:23:15,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126918506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:23:15,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:23:15,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-20 21:23:15,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123916746] [2022-11-20 21:23:15,171 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:15,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:23:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:23:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:23:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:23:15,172 INFO L87 Difference]: Start difference. First operand 354 states and 441 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:23:15,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:15,425 INFO L93 Difference]: Finished difference Result 391 states and 471 transitions. [2022-11-20 21:23:15,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:23:15,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 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 42 [2022-11-20 21:23:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:15,428 INFO L225 Difference]: With dead ends: 391 [2022-11-20 21:23:15,428 INFO L226 Difference]: Without dead ends: 391 [2022-11-20 21:23:15,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:23:15,429 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 35 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:15,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 164 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:23:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-20 21:23:15,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 369. [2022-11-20 21:23:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 331 states have (on average 1.299093655589124) internal successors, (430), 352 states have internal predecessors, (430), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-20 21:23:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 456 transitions. [2022-11-20 21:23:15,438 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 456 transitions. Word has length 42 [2022-11-20 21:23:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:15,439 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 456 transitions. [2022-11-20 21:23:15,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:23:15,439 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 456 transitions. [2022-11-20 21:23:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 21:23:15,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:15,440 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:23:15,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:15,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:15,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-20 21:23:16,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:16,054 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:23:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:16,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2022-11-20 21:23:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:23:16,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737125313] [2022-11-20 21:23:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:16,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:23:16,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:23:16,056 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:23:16,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 21:23:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:16,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:23:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:23:19,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:23:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:23:19,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:22,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:23:22,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737125313] [2022-11-20 21:23:22,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737125313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2012371818] [2022-11-20 21:23:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:22,873 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:23:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:23:22,874 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:23:22,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-20 21:23:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:23:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:26,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:23:26,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:23:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:23:26,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:28,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2012371818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:28,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149480072] [2022-11-20 21:23:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:28,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:28,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:28,652 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:28,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-20 21:23:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:23:28,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:33,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:23:33,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:23:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:23:33,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:34,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149480072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:34,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:23:34,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 8 [2022-11-20 21:23:34,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29990352] [2022-11-20 21:23:34,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:23:34,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:23:34,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:23:34,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:23:34,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=115, Unknown=5, NotChecked=0, Total=156 [2022-11-20 21:23:34,140 INFO L87 Difference]: Start difference. First operand 369 states and 456 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 21:23:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:41,298 INFO L93 Difference]: Finished difference Result 423 states and 492 transitions. [2022-11-20 21:23:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:23:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-11-20 21:23:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:41,304 INFO L225 Difference]: With dead ends: 423 [2022-11-20 21:23:41,304 INFO L226 Difference]: Without dead ends: 423 [2022-11-20 21:23:41,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=154, Invalid=390, Unknown=8, NotChecked=0, Total=552 [2022-11-20 21:23:41,305 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 391 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:41,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 284 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 136 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-11-20 21:23:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-20 21:23:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 369. [2022-11-20 21:23:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 331 states have (on average 1.2900302114803626) internal successors, (427), 352 states have internal predecessors, (427), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-20 21:23:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 453 transitions. [2022-11-20 21:23:41,313 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 453 transitions. Word has length 48 [2022-11-20 21:23:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:41,314 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 453 transitions. [2022-11-20 21:23:41,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 21:23:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 453 transitions. [2022-11-20 21:23:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 21:23:41,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:41,315 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:23:41,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:41,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-20 21:23:41,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:41,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:41,928 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:23:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-11-20 21:23:41,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:23:41,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132787163] [2022-11-20 21:23:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:41,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:23:41,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:23:41,930 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:23:41,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 21:23:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:23:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 21:23:42,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:23:42,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:23:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132787163] [2022-11-20 21:23:42,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132787163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:23:42,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:23:42,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:23:42,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707414652] [2022-11-20 21:23:42,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:23:42,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:23:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:23:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:23:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:23:42,046 INFO L87 Difference]: Start difference. First operand 369 states and 453 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:23:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:23:42,057 INFO L93 Difference]: Finished difference Result 309 states and 363 transitions. [2022-11-20 21:23:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:23:42,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 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 47 [2022-11-20 21:23:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:23:42,059 INFO L225 Difference]: With dead ends: 309 [2022-11-20 21:23:42,059 INFO L226 Difference]: Without dead ends: 309 [2022-11-20 21:23:42,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:23:42,059 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:23:42,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:23:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-20 21:23:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 294. [2022-11-20 21:23:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 264 states have (on average 1.2424242424242424) internal successors, (328), 279 states have internal predecessors, (328), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-20 21:23:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 348 transitions. [2022-11-20 21:23:42,067 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 348 transitions. Word has length 47 [2022-11-20 21:23:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:23:42,067 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 348 transitions. [2022-11-20 21:23:42,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:23:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 348 transitions. [2022-11-20 21:23:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 21:23:42,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:23:42,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:23:42,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-20 21:23:42,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:23:42,281 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:23:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:23:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2022-11-20 21:23:42,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:23:42,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402240958] [2022-11-20 21:23:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:42,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:23:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:23:42,283 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:23:42,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-20 21:23:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:42,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:23:42,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:23:45,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:23:45,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:23:45,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:23:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:23:45,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:48,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:23:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402240958] [2022-11-20 21:23:48,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402240958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:48,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1398053116] [2022-11-20 21:23:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:48,399 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:23:48,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:23:48,400 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:23:48,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-20 21:23:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:48,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:23:48,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:23:53,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:23:54,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:23:54,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:23:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 21:23:54,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:23:56,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1398053116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:23:56,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913415518] [2022-11-20 21:23:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:23:56,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:23:56,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:23:56,378 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:23:56,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-20 21:23:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:23:56,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:23:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:23:59,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:23:59,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:23:59,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:23:59,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:23:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:23:59,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:02,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913415518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:24:02,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:24:02,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-20 21:24:02,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571937345] [2022-11-20 21:24:02,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:02,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:24:02,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:24:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:24:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2022-11-20 21:24:02,017 INFO L87 Difference]: Start difference. First operand 294 states and 348 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:24:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:19,252 INFO L93 Difference]: Finished difference Result 341 states and 387 transitions. [2022-11-20 21:24:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 21:24:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-11-20 21:24:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:19,253 INFO L225 Difference]: With dead ends: 341 [2022-11-20 21:24:19,253 INFO L226 Difference]: Without dead ends: 341 [2022-11-20 21:24:19,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=129, Invalid=361, Unknown=16, NotChecked=0, Total=506 [2022-11-20 21:24:19,254 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 144 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:19,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 235 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 180 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-11-20 21:24:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-20 21:24:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 293. [2022-11-20 21:24:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 264 states have (on average 1.2386363636363635) internal successors, (327), 278 states have internal predecessors, (327), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 21:24:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 345 transitions. [2022-11-20 21:24:19,260 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 345 transitions. Word has length 50 [2022-11-20 21:24:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:19,260 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 345 transitions. [2022-11-20 21:24:19,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:24:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 345 transitions. [2022-11-20 21:24:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 21:24:19,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:19,261 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:19,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:19,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:19,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-20 21:24:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:24:19,874 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:24:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-11-20 21:24:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:24:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22665933] [2022-11-20 21:24:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:19,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:24:19,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:24:19,876 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:24:19,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 21:24:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:19,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:24:19,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:24:20,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:24:20,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:24:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22665933] [2022-11-20 21:24:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22665933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [218037062] [2022-11-20 21:24:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:20,798 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:24:20,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:24:20,799 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:24:20,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-20 21:24:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:24:20,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:24:21,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:24:21,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [218037062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:21,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175790786] [2022-11-20 21:24:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:21,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:21,762 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:21,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-20 21:24:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:24:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:24:22,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:24:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175790786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:22,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:24:22,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-20 21:24:22,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195202401] [2022-11-20 21:24:22,494 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:22,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:24:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:24:22,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:24:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:24:22,496 INFO L87 Difference]: Start difference. First operand 293 states and 345 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 21:24:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:23,352 INFO L93 Difference]: Finished difference Result 321 states and 361 transitions. [2022-11-20 21:24:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 21:24:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-11-20 21:24:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:23,354 INFO L225 Difference]: With dead ends: 321 [2022-11-20 21:24:23,354 INFO L226 Difference]: Without dead ends: 321 [2022-11-20 21:24:23,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:24:23,355 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 257 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:23,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 359 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:24:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-20 21:24:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 293. [2022-11-20 21:24:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 264 states have (on average 1.2272727272727273) internal successors, (324), 278 states have internal predecessors, (324), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 21:24:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 342 transitions. [2022-11-20 21:24:23,361 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 342 transitions. Word has length 51 [2022-11-20 21:24:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:23,362 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 342 transitions. [2022-11-20 21:24:23,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 21:24:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 342 transitions. [2022-11-20 21:24:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 21:24:23,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:23,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2022-11-20 21:24:23,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:23,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:24:23,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-20 21:24:23,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:24:23,969 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:24:23,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:23,970 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-11-20 21:24:23,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:24:23,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229656713] [2022-11-20 21:24:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:23,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:24:23,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:24:23,972 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:24:23,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 21:24:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:24:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:24,380 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:24:24,380 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 13 treesize of output 13 [2022-11-20 21:24:27,091 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-20 21:24:27,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-20 21:24:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:27,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:27,351 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:24:27,351 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 66 treesize of output 63 [2022-11-20 21:24:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:30,560 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:24:30,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229656713] [2022-11-20 21:24:30,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229656713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:30,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1923433405] [2022-11-20 21:24:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:30,560 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:24:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:24:30,561 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:24:30,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-20 21:24:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:30,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:24:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:31,133 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-20 21:24:31,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 21:24:31,500 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:24:31,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 21:24:31,613 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 21:24:31,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-20 21:24:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:31,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:31,905 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:24:31,906 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 128 treesize of output 123 [2022-11-20 21:24:42,162 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:24:42,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2022-11-20 21:24:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:42,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1923433405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:42,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12816890] [2022-11-20 21:24:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:42,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:42,564 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:42,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-20 21:24:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:24:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:42,752 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:24:42,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:24:43,120 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:24:43,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 21:24:43,195 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 21:24:43,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-20 21:24:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:43,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:43,382 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:24:43,383 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 66 treesize of output 63 [2022-11-20 21:24:53,931 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:24:53,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2022-11-20 21:24:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:54,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12816890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:54,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:24:54,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 10, 7, 8] total 31 [2022-11-20 21:24:54,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004148895] [2022-11-20 21:24:54,149 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:54,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 21:24:54,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:24:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 21:24:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=795, Unknown=9, NotChecked=0, Total=992 [2022-11-20 21:24:54,151 INFO L87 Difference]: Start difference. First operand 293 states and 342 transitions. Second operand has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 21:24:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:59,449 INFO L93 Difference]: Finished difference Result 355 states and 395 transitions. [2022-11-20 21:24:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:24:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Word has length 51 [2022-11-20 21:24:59,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:59,451 INFO L225 Difference]: With dead ends: 355 [2022-11-20 21:24:59,451 INFO L226 Difference]: Without dead ends: 355 [2022-11-20 21:24:59,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 271 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=367, Invalid=1262, Unknown=11, NotChecked=0, Total=1640 [2022-11-20 21:24:59,452 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 322 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:59,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 290 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 213 Invalid, 0 Unknown, 161 Unchecked, 0.6s Time] [2022-11-20 21:24:59,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-20 21:24:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 290. [2022-11-20 21:24:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 264 states have (on average 1.2045454545454546) internal successors, (318), 275 states have internal predecessors, (318), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 21:24:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 336 transitions. [2022-11-20 21:24:59,459 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 336 transitions. Word has length 51 [2022-11-20 21:24:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:59,460 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 336 transitions. [2022-11-20 21:24:59,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 21:24:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 336 transitions. [2022-11-20 21:24:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 21:24:59,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:59,461 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2022-11-20 21:24:59,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:59,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-20 21:24:59,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:00,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:00,074 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:25:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2022-11-20 21:25:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:00,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798843689] [2022-11-20 21:25:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:00,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:00,076 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:00,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 21:25:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:25:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:02,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:25:05,106 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:25:05,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:25:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:05,646 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:25:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:05,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:06,106 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:25:06,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:25:08,979 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:25:08,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:25:13,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798843689] [2022-11-20 21:25:13,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798843689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [146156692] [2022-11-20 21:25:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:13,052 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:13,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-20 21:25:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:25:13,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:15,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:25:16,004 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:25:16,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:25:16,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:16,523 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:25:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:16,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:16,786 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:25:16,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:25:19,671 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:25:19,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:25:24,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [146156692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:24,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151482240] [2022-11-20 21:25:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:24,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:24,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:24,272 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:24,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-20 21:25:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:25:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:24,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:25:24,902 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:25:24,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:25:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:25:25,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:25:25,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151482240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:25:25,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:25,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 14 [2022-11-20 21:25:25,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918624132] [2022-11-20 21:25:25,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:25:25,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:25:25,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:25,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:25:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=344, Unknown=8, NotChecked=0, Total=462 [2022-11-20 21:25:25,184 INFO L87 Difference]: Start difference. First operand 290 states and 336 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:25:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:25,539 INFO L93 Difference]: Finished difference Result 353 states and 394 transitions. [2022-11-20 21:25:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:25:25,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-11-20 21:25:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:25,542 INFO L225 Difference]: With dead ends: 353 [2022-11-20 21:25:25,542 INFO L226 Difference]: Without dead ends: 353 [2022-11-20 21:25:25,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=124, Invalid=374, Unknown=8, NotChecked=0, Total=506 [2022-11-20 21:25:25,542 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 189 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:25,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 79 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:25:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-20 21:25:25,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 290. [2022-11-20 21:25:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 264 states have (on average 1.1931818181818181) internal successors, (315), 275 states have internal predecessors, (315), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 21:25:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 333 transitions. [2022-11-20 21:25:25,549 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 333 transitions. Word has length 51 [2022-11-20 21:25:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:25,549 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 333 transitions. [2022-11-20 21:25:25,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 21:25:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 333 transitions. [2022-11-20 21:25:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 21:25:25,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:25,550 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:25,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:25,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:25,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-20 21:25:26,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:26,159 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:25:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-11-20 21:25:26,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048991416] [2022-11-20 21:25:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:26,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:26,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:26,161 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:26,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 21:25:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:26,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:25:26,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:25:26,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:25:27,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048991416] [2022-11-20 21:25:27,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048991416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [381467716] [2022-11-20 21:25:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:27,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:27,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:27,146 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:27,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-20 21:25:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:27,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:25:27,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:25:27,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:25:28,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [381467716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855488917] [2022-11-20 21:25:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:28,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:28,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:28,140 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:28,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-20 21:25:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:28,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:25:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:25:28,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:25:28,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855488917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:28,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:25:28,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-20 21:25:28,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814923781] [2022-11-20 21:25:28,923 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:28,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:25:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:25:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:25:28,925 INFO L87 Difference]: Start difference. First operand 290 states and 333 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:25:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:29,790 INFO L93 Difference]: Finished difference Result 304 states and 343 transitions. [2022-11-20 21:25:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:25:29,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-11-20 21:25:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:29,792 INFO L225 Difference]: With dead ends: 304 [2022-11-20 21:25:29,792 INFO L226 Difference]: Without dead ends: 304 [2022-11-20 21:25:29,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:25:29,793 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 215 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:29,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 274 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:25:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-20 21:25:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 289. [2022-11-20 21:25:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.178030303030303) internal successors, (311), 274 states have internal predecessors, (311), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 21:25:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 329 transitions. [2022-11-20 21:25:29,799 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 329 transitions. Word has length 52 [2022-11-20 21:25:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:29,799 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 329 transitions. [2022-11-20 21:25:29,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:25:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 329 transitions. [2022-11-20 21:25:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 21:25:29,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:29,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-11-20 21:25:29,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:30,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:30,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-20 21:25:30,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:30,404 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:25:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-11-20 21:25:30,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:30,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602179739] [2022-11-20 21:25:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:30,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:30,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:30,406 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:30,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 21:25:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:30,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:25:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:31,035 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:25:31,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 21:25:34,127 INFO L321 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2022-11-20 21:25:34,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 46 [2022-11-20 21:25:34,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:34,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:34,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602179739] [2022-11-20 21:25:34,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602179739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [269677522] [2022-11-20 21:25:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:34,862 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:34,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:34,863 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:34,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-20 21:25:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:25:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:35,771 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 21:25:35,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-20 21:25:38,720 INFO L321 Elim1Store]: treesize reduction 68, result has 38.2 percent of original size [2022-11-20 21:25:38,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 62 [2022-11-20 21:25:38,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:39,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:41,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [269677522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:41,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153429860] [2022-11-20 21:25:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:41,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:41,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:41,382 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:41,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-20 21:25:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:41,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:25:41,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:41,962 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:25:41,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:25:42,721 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-20 21:25:42,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-20 21:25:42,852 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-20 21:25:42,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 32 [2022-11-20 21:25:43,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:43,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:43,333 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-20 21:25:43,334 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 196 treesize of output 183 [2022-11-20 21:25:46,150 INFO L321 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-11-20 21:25:46,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 115 [2022-11-20 21:25:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153429860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:47,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-20 21:25:47,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 39 [2022-11-20 21:25:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135494649] [2022-11-20 21:25:47,357 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 21:25:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 21:25:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1575, Unknown=5, NotChecked=0, Total=1806 [2022-11-20 21:25:47,359 INFO L87 Difference]: Start difference. First operand 289 states and 329 transitions. Second operand has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-20 21:26:04,741 WARN L233 SmtUtils]: Spent 7.88s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:26:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:26:12,095 INFO L93 Difference]: Finished difference Result 346 states and 382 transitions. [2022-11-20 21:26:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 21:26:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2022-11-20 21:26:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:26:12,097 INFO L225 Difference]: With dead ends: 346 [2022-11-20 21:26:12,097 INFO L226 Difference]: Without dead ends: 346 [2022-11-20 21:26:12,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=704, Invalid=3445, Unknown=11, NotChecked=0, Total=4160 [2022-11-20 21:26:12,099 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 632 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:26:12,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 500 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 491 Invalid, 0 Unknown, 340 Unchecked, 1.3s Time] [2022-11-20 21:26:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-20 21:26:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 289. [2022-11-20 21:26:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 274 states have internal predecessors, (310), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 21:26:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 328 transitions. [2022-11-20 21:26:12,105 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 328 transitions. Word has length 52 [2022-11-20 21:26:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:26:12,105 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 328 transitions. [2022-11-20 21:26:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-20 21:26:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 328 transitions. [2022-11-20 21:26:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 21:26:12,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:26:12,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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] [2022-11-20 21:26:12,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-20 21:26:12,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:26:12,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-20 21:26:12,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:12,711 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:26:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:26:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2022-11-20 21:26:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:26:12,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76465950] [2022-11-20 21:26:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:26:12,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:26:12,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:26:12,713 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:26:12,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 21:26:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:26:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 21:26:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:13,494 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:26:13,494 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 18 [2022-11-20 21:26:14,210 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-20 21:26:14,210 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 17 treesize of output 17 [2022-11-20 21:26:14,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:26:14,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:14,904 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 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 21:26:15,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:26:15,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:26:15,384 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:26:15,384 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-20 21:26:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:26:15,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:16,120 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-20 21:26:16,120 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 19 treesize of output 18 [2022-11-20 21:26:16,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-11-20 21:26:16,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:26:16,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76465950] [2022-11-20 21:26:16,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76465950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:26:16,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1150022426] [2022-11-20 21:26:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:26:16,271 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:26:16,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:26:16,272 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:26:16,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-20 21:26:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:26:16,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 21:26:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:17,181 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:26:17,182 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 18 [2022-11-20 21:26:17,637 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-20 21:26:17,637 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 17 treesize of output 17 [2022-11-20 21:26:18,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:26:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:18,259 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 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 21:26:18,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:26:18,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:26:18,499 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:26:18,499 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-20 21:26:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:26:18,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:18,794 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-20 21:26:18,795 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 19 treesize of output 18 [2022-11-20 21:26:18,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-11-20 21:26:18,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1150022426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:26:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419632580] [2022-11-20 21:26:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:26:18,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:18,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:26:18,911 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:26:18,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-20 21:26:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:26:19,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:26:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:19,909 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 17 treesize of output 19 [2022-11-20 21:26:19,929 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-20 21:26:19,929 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 17 treesize of output 17 [2022-11-20 21:26:20,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-20 21:26:20,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:26:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:26:20,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:20,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:26:20,911 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 23 treesize of output 11 [2022-11-20 21:26:20,925 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 12 treesize of output 8 [2022-11-20 21:26:23,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:26:23,513 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 43 treesize of output 47 [2022-11-20 21:26:23,844 INFO L321 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-11-20 21:26:23,844 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 34 treesize of output 55 [2022-11-20 21:26:24,001 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 21:26:24,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-11-20 21:26:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:26:24,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419632580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:26:24,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-20 21:26:24,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 8, 10] total 34 [2022-11-20 21:26:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810379198] [2022-11-20 21:26:24,148 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-20 21:26:24,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 21:26:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:26:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 21:26:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1278, Unknown=9, NotChecked=0, Total=1482 [2022-11-20 21:26:24,149 INFO L87 Difference]: Start difference. First operand 289 states and 328 transitions. Second operand has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 21:27:24,015 WARN L233 SmtUtils]: Spent 16.43s on a formula simplification. DAG size of input: 46 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:27:30,627 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:27:43,286 WARN L233 SmtUtils]: Spent 12.29s on a formula simplification. DAG size of input: 36 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:27:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:43,915 INFO L93 Difference]: Finished difference Result 329 states and 363 transitions. [2022-11-20 21:27:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 21:27:43,915 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2022-11-20 21:27:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:43,917 INFO L225 Difference]: With dead ends: 329 [2022-11-20 21:27:43,917 INFO L226 Difference]: Without dead ends: 329 [2022-11-20 21:27:43,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 198 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 84.4s TimeCoverageRelationStatistics Valid=1586, Invalid=7075, Unknown=81, NotChecked=0, Total=8742 [2022-11-20 21:27:43,920 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 885 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 836 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:43,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 656 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 373 Invalid, 0 Unknown, 836 Unchecked, 1.1s Time] [2022-11-20 21:27:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-20 21:27:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 299. [2022-11-20 21:27:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 274 states have (on average 1.1642335766423357) internal successors, (319), 284 states have internal predecessors, (319), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-20 21:27:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 336 transitions. [2022-11-20 21:27:43,926 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 336 transitions. Word has length 53 [2022-11-20 21:27:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:43,927 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 336 transitions. [2022-11-20 21:27:43,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 21:27:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 336 transitions. [2022-11-20 21:27:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 21:27:43,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:43,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2022-11-20 21:27:43,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:44,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:44,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-20 21:27:44,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:44,543 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:27:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:44,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-11-20 21:27:44,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:27:44,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751586427] [2022-11-20 21:27:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:44,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:27:44,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:27:44,545 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:27:44,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 21:27:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:44,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:27:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:44,941 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:27:44,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 21:27:45,258 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_292 (_ BitVec 1)) (v_ArrVal_291 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_291) |c_old(~global~0.base)| v_ArrVal_292)) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-20 21:27:45,381 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 21:27:45,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 43 [2022-11-20 21:27:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-20 21:27:45,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:27:47,884 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:27:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751586427] [2022-11-20 21:27:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751586427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:27:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2085701413] [2022-11-20 21:27:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:47,885 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:27:47,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:27:47,886 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:27:47,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-20 21:27:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:48,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:27:48,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:48,738 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 21:27:48,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-20 21:27:51,060 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_306 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)) |c_old(~global~0.base)| v_ArrVal_306))) is different from true [2022-11-20 21:27:51,160 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-20 21:27:51,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 43 [2022-11-20 21:27:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-20 21:27:51,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:27:51,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2085701413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:27:51,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755308974] [2022-11-20 21:27:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:51,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:27:51,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:27:51,610 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:27:51,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-20 21:27:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:51,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:27:51,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:51,950 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:27:51,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 21:27:52,264 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_291 (_ BitVec 1)) (v_ArrVal_318 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_291) |c_old(~global~0.base)| v_ArrVal_318)) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-20 21:27:52,406 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-20 21:27:52,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-20 21:27:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-20 21:27:52,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:01,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755308974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:28:01,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:28:01,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-20 21:28:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206945565] [2022-11-20 21:28:01,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:28:01,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:28:01,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:28:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:28:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=466, Unknown=9, NotChecked=138, Total=702 [2022-11-20 21:28:01,038 INFO L87 Difference]: Start difference. First operand 299 states and 336 transitions. Second operand has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 21:28:34,387 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_291 (_ BitVec 1)) (v_ArrVal_318 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_291) |c_old(~global~0.base)| v_ArrVal_318)) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) (exists ((v_ArrVal_292 (_ BitVec 1)) (v_ArrVal_291 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_291) |c_old(~global~0.base)| v_ArrVal_292)) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_306 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)) |c_old(~global~0.base)| v_ArrVal_306)))) is different from true [2022-11-20 21:28:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:28:34,457 INFO L93 Difference]: Finished difference Result 322 states and 353 transitions. [2022-11-20 21:28:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 21:28:34,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2022-11-20 21:28:34,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:28:34,459 INFO L225 Difference]: With dead ends: 322 [2022-11-20 21:28:34,459 INFO L226 Difference]: Without dead ends: 322 [2022-11-20 21:28:34,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=411, Invalid=1479, Unknown=18, NotChecked=348, Total=2256 [2022-11-20 21:28:34,459 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 433 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:28:34,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 488 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 322 Invalid, 0 Unknown, 768 Unchecked, 0.8s Time] [2022-11-20 21:28:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-20 21:28:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 298. [2022-11-20 21:28:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 274 states have (on average 1.1605839416058394) internal successors, (318), 283 states have internal predecessors, (318), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-20 21:28:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 335 transitions. [2022-11-20 21:28:34,466 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 335 transitions. Word has length 54 [2022-11-20 21:28:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:28:34,466 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 335 transitions. [2022-11-20 21:28:34,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 21:28:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 335 transitions. [2022-11-20 21:28:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 21:28:34,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:28:34,468 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:28:34,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-20 21:28:34,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-11-20 21:28:34,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-20 21:28:35,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:35,081 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:28:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:28:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 2 times [2022-11-20 21:28:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:28:35,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733868238] [2022-11-20 21:28:35,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:28:35,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:28:35,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:28:35,082 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:28:35,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 21:28:35,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:28:35,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:28:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:28:35,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:38,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:28:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:28:38,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:45,229 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:28:45,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:28:45,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733868238] [2022-11-20 21:28:45,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733868238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:28:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1184029086] [2022-11-20 21:28:45,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:28:45,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:28:45,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:28:45,231 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:28:45,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-20 21:28:45,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:28:45,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:28:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:28:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:48,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:48,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:28:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:28:48,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:49,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1184029086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:28:49,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794883099] [2022-11-20 21:28:49,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:28:49,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:49,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:28:49,105 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:28:49,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-20 21:28:49,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:28:49,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:28:49,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:28:49,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:54,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:28:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:28:54,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:56,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794883099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:28:56,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:28:56,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 9 [2022-11-20 21:28:56,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218019010] [2022-11-20 21:28:56,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:28:56,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:28:56,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:28:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:28:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=161, Unknown=5, NotChecked=0, Total=210 [2022-11-20 21:28:56,894 INFO L87 Difference]: Start difference. First operand 298 states and 335 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 21:29:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:29:04,458 INFO L93 Difference]: Finished difference Result 349 states and 381 transitions. [2022-11-20 21:29:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 21:29:04,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 56 [2022-11-20 21:29:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:29:04,460 INFO L225 Difference]: With dead ends: 349 [2022-11-20 21:29:04,461 INFO L226 Difference]: Without dead ends: 349 [2022-11-20 21:29:04,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=205, Invalid=597, Unknown=10, NotChecked=0, Total=812 [2022-11-20 21:29:04,462 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 287 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:29:04,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 322 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 205 Invalid, 0 Unknown, 61 Unchecked, 0.6s Time] [2022-11-20 21:29:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-20 21:29:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 257. [2022-11-20 21:29:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 235 states have (on average 1.1531914893617021) internal successors, (271), 244 states have internal predecessors, (271), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-20 21:29:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 286 transitions. [2022-11-20 21:29:04,468 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 286 transitions. Word has length 56 [2022-11-20 21:29:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:29:04,469 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 286 transitions. [2022-11-20 21:29:04,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 21:29:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 286 transitions. [2022-11-20 21:29:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 21:29:04,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:29:04,470 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 21:29:04,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-20 21:29:04,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-20 21:29:04,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-20 21:29:05,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:29:05,074 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 21:29:05,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:29:05,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1842875129, now seen corresponding path program 1 times [2022-11-20 21:29:05,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:29:05,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639261383] [2022-11-20 21:29:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:29:05,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:29:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:29:05,076 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:29:05,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 21:29:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:29:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:29:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:29:05,704 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:29:05,705 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 18 [2022-11-20 21:29:06,126 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:29:06,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:29:06,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:29:06,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:06,655 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 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 21:29:06,924 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:29:06,925 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-20 21:29:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:29:07,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:29:08,098 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 12 treesize of output 10 [2022-11-20 21:29:08,136 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:29:08,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:29:08,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:29:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639261383] [2022-11-20 21:29:08,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639261383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:29:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1693582505] [2022-11-20 21:29:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:29:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:29:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:29:08,357 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:29:08,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-20 21:29:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:29:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 21:29:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:29:09,071 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:29:09,072 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 18 [2022-11-20 21:29:09,377 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:29:09,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:29:09,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:29:09,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:09,812 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 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 21:29:10,011 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:29:10,011 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-20 21:29:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:29:10,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:29:10,549 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 12 treesize of output 10 [2022-11-20 21:29:10,595 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:29:10,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:29:10,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1693582505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:29:10,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787147881] [2022-11-20 21:29:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:29:10,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:29:10,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:29:10,762 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:29:10,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5414b030-477f-4979-a153-391abe061115/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-20 21:29:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:29:10,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:29:10,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:29:11,283 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:29:11,284 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 18 [2022-11-20 21:29:11,951 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:29:11,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:29:12,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:29:12,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-20 21:29:13,172 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:29:13,172 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-20 21:29:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:29:13,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:29:13,992 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 21:29:13,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:29:14,036 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 12 treesize of output 10 [2022-11-20 21:29:14,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787147881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:29:14,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:29:14,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 20 [2022-11-20 21:29:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638198158] [2022-11-20 21:29:14,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:29:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:29:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:29:14,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:29:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=621, Unknown=16, NotChecked=0, Total=756 [2022-11-20 21:29:14,302 INFO L87 Difference]: Start difference. First operand 257 states and 286 transitions. Second operand has 22 states, 20 states have (on average 4.1) internal successors, (82), 18 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)